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X-ORIGINAL-URL:https://www.ift.uam-csic.es
X-WR-CALDESC:Events for Instituto de Física Teórica
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TZID:Europe/Madrid
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DTSTART:20250330T010000
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DTSTART:20251026T010000
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DTSTART:20260329T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260611T150000
DTEND;TZID=Europe/Madrid:20260611T160000
DTSTAMP:20260713T233122
CREATED:20260310T095036Z
LAST-MODIFIED:20260603T094247Z
UID:24580-1781190000-1781193600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Revisiting Critical Higgs Inflation: CMB Observables\, Electroweak Couplings\, and Perturbative Unitarity'
DESCRIPTION:Title: Revisiting Critical Higgs Inflation: CMB Observables\, Electroweak Couplings\, and Perturbative Unitarity\n \nSpeaker: Sarah R. Geller (Yale U.) \nVenue & Time: Red Room / 15:00\n\n\n\nAbstract:\nAn intriguing and economical possibility to explain many cosmological observations is Higgs inflation\, in which inflation is driven by the Standard Model Higgs with a non-minimal coupling to gravity. I will discuss near-critical Higgs inflation at two loops and show that\, for any set of parameters derived from SM couplings at the electroweak scale and run to the inflationary scale\, one can find a value of the non-minimal coupling that brings the model into compliance with all measured CMB observables. Unlike standard Higgs inflation\, which typically requires unnaturally large values of the non-minimal coupling\, I will demonstrate that in metric gravity we can match the CMB while staying within 3σ of electroweak precision data with non-minimal couplings on the order of 50–200. The success of the model\, however\, comes at the cost of self-consistency when it is treated as an effective description of electroweak-scale physics; that is\, the model becomes unavoidably sensitive to physics beyond the SM in the UV\, undermining the simplicity that originally motivated Higgs inflation.
URL:https://www.ift.uam-csic.es/event/seminar-by-sarah-r-geller-tbc/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260611T120000
DTEND;TZID=Europe/Madrid:20260611T130000
DTSTAMP:20260713T233122
CREATED:20260603T095641Z
LAST-MODIFIED:20260608T101212Z
UID:25149-1781179200-1781182800@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'Bubble Nucleation from Boson Star Collapse'
DESCRIPTION:Title: Bubble Nucleation from Boson Star Collapse\n\nSpeaker: Kateryna Radchenko Serdula (IFT) will present “Bubble Nucleation from Boson Star Collapse”\, 2511.21826\n\nVenue&Time: Gray Room 2 / 12:00\n\nAbstract: We present a new classical mechanism for nucleation of bubbles of true vacuum. The mechanism arises when dense boson stars form in the false vacuum. As the boson stars collapse due to attractive self-interactions\, the field inside the star cores is enhanced beyond the potential barrier. Subsequently the stars explode as true vacuum bubbles and induce a cosmological phase transition. The mechanism raises the possibility that a vacuum that is stable against quantum tunneling can be vulnerable to “astrophysical” processes.\n 
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-17/
LOCATION:Grey Room 2\, Instituto de Física Teórica\, Madrid\, Madrid\, 28037\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260609T140000
DTEND;TZID=Europe/Madrid:20260609T150000
DTSTAMP:20260713T233122
CREATED:20260406T092501Z
LAST-MODIFIED:20260406T092501Z
UID:24832-1781013600-1781017200@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-29/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260609T113000
DTEND;TZID=Europe/Madrid:20260609T133000
DTSTAMP:20260713T233122
CREATED:20260527T131127Z
LAST-MODIFIED:20260604T123628Z
UID:25104-1781004600-1781011800@www.ift.uam-csic.es
SUMMARY:Holo-Club: 'Boundary entropy and entanglement phase transitions in  holographic ICFTs'
DESCRIPTION:Title: Boundary entropy and entanglement phase transitions in\nholographic ICFTs \nSpeaker: Evangelos Afxonidis (University of Oviedo) \nVenue&Time: 11:30 / Gray Room 3 \nAbstract: In 1+1 dimensional conformal field theory with a boundary\, the boundary contribution to the entanglement entropy is encoded in a single number g\, effectively counting the boundary degrees of freedom. In contrast\, for interface CFTs the corresponding quantity is a non-trivial function depending on the position of the interval relative to the interface\, giving access to much more detailed information about the defect. In this talk\, I will present several holographic examples illustrating the structure of this g-function and discuss the limit in which the entangling interval approaches the interface\, relating it to the effective central charge. I will conclude with a discussion of entanglement phase transitions associated to bipartite entanglement in a variety of holographic interfaces.
URL:https://www.ift.uam-csic.es/event/holo-club-title-boundary-entropy-and-entanglement-phase-transitions-in-holographic-icfts/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260608T113000
DTEND;TZID=Europe/Madrid:20260608T123000
DTSTAMP:20260713T233122
CREATED:20260608T063731Z
LAST-MODIFIED:20260608T064238Z
UID:25169-1780918200-1780921800@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Exponential quantum advantage in processing massive classical data'
DESCRIPTION:Title: ‘Exponential quantum advantage in processing massive classical data’\n\nVenue/Time: 11:30 / Gray Room 1\n\nSpeaker:  Isabel María Moreno Cuadrado (ICMAT) will present ‘Exponential quantum advantage in processing massive classical data’ by Hsin-Yuan Huang et al.\n\nAbstract: Broadly applicable quantum advantage\, particularly in classical data processing and machine learning\, has been a fundamental open problem. In this work\, we prove that a small quantum computer of polylogarithmic size can perform large-scale classification and dimension reduction on massive classical data by processing samples on the fly\, whereas any classical machine achieving the same prediction performance requires exponentially larger size. Furthermore\, classical machines that are exponentially larger yet below the required size need superpolynomially more samples and time. We validate these quantum advantages in real-world applications\, including single-cell RNA sequencing and movie review sentiment analysis\, demonstrating four to six orders of magnitude reduction in size with fewer than 60 logical qubits. These quantum advantages are enabled by quantum oracle sketching\, an algorithm for accessing the classical world in quantum superposition using only random classical data samples. Combined with classical shadows\, our algorithm circumvents the data loading and readout bottleneck to construct succinct classical models from massive classical data\, a task provably impossible for any classical machine that is not exponentially larger than the quantum machine. These quantum advantages persist even when classical machines are granted unlimited time or if BPP=BQP\, and rely only on the correctness of quantum mechanics. Together\, our results establish machine learning on classical data as a broad and natural domain of quantum advantage and a fundamental test of quantum mechanics at the complexity frontier.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-exponential-quantum-advantage-in-processing-massive-classical-data/
LOCATION:Gray Room 1\, Instituto de Física Teórica\, C/ Nicolás Cabrera 13-15\, Cantoblanco\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260605T113000
DTEND;TZID=Europe/Madrid:20260605T123000
DTSTAMP:20260713T233122
CREATED:20260601T112441Z
LAST-MODIFIED:20260601T112441Z
UID:25131-1780659000-1780662600@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Onset of Ergodicity Across Scales on a Digital Quantum Processor'
DESCRIPTION:Title: ‘Onset of Ergodicity Across Scales on a Digital Quantum Processor’\n\nSpeaker: Marcos Crichigno (Phasecraft)\n\nVenue & Time: Gray Room 3 / 11:30\n\nAbstract: Boltzmann’s ergodic hypothesis lies at the foundation of classical statistical mechanics\, yet its quantum counterpart remains far less understood. In this talk\, I will discuss a quantum-information-theoretic measure of quantum ergodicity that probes its emergence at different resolution scales\, revealing otherwise inaccessible global aspects of the quantum many-body wavefunction. We apply this metric to chart the boundary between ergodic and non-ergodic behavior in a two-dimensional disordered Floquet-Heisenberg system\, using large-scale simulations\, both classical and quantum on IBM’s latest digital quantum processor with up to 10×10 qubits
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-onset-of-ergodicity-across-scales-on-a-digital-quantum-processor/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260604T170000
DTEND;TZID=Europe/Madrid:20260604T180000
DTSTAMP:20260713T233122
CREATED:20260601T180607Z
LAST-MODIFIED:20260601T180607Z
UID:25133-1780592400-1780596000@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Cosmological Lower Bound on Heavy-Neutrino Masses'
DESCRIPTION:Valeria Costa (IFT) will present: Cosmological Lower Bound on Heavy-Neutrino Masses\, de B. W. Lee y S. Weinberg. \nVenue&Time: Blue Room / 17:00 \nAbstract: \nThe present cosmic mass density of possible-stable neutral heavy leptons is calculated in a standard cosmological model. In order for this density not to exceed the upper limit of 2*10^-29 g/cm^3\, the lepton mass would have to be greater than a lower bound of the order of 2 GeV.
URL:https://www.ift.uam-csic.es/event/old-journal-club-cosmological-lower-bound-on-heavy-neutrino-masses/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260604T120000
DTEND;TZID=Europe/Madrid:20260604T130000
DTSTAMP:20260713T233123
CREATED:20260529T081532Z
LAST-MODIFIED:20260529T081532Z
UID:25116-1780574400-1780578000@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 2.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-16/
LOCATION:Grey Room 2\, Instituto de Física Teórica\, Madrid\, Madrid\, 28037\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260604T120000
DTEND;TZID=Europe/Madrid:20260604T130000
DTSTAMP:20260713T233123
CREATED:20260529T081413Z
LAST-MODIFIED:20260529T081413Z
UID:25114-1780574400-1780578000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Sharpened Dynamical Cobordism'
DESCRIPTION:Strings\, Pheno and the Swampland (SPS) Journal Club \n\n\nTitle: Sharpened Dynamical Cobordism\n\nSpeaker: Alejandro Javier Puga Gómez (IFT) \n\nVenue&Time: Red Room / 12:00\n \nAbstract: We propose a sharpened version of Dynamical Cobordism\, where the physical structure ξ of the theory in question determines an allowed range Rξ for the critical exponent δ. We interpret a singularity with δ∈Rξ as a true transition-to-nothing\, i.e.\, a configuration ending spacetime\, while a singularity with δ∉Rξ indicates some obstruction to such a transition\, i.e.\, the presence of a non-trivial cobordism global charge\, which is incompatible with a theory of quantum gravity. In the spirit of the original Cobordism Conjecture\, this apparent inconsistency of the theory can be alleviated via the modification of the structure\, for instance by introducing new degrees of freedom and associated defects. Inspired by the Gubser criterion for good singularities\, we propose a way to determine Rξ. As a proof-of-concept we show explicitly how the introduction of a higher-form gauge field changes the allowed range of δ compared to an EFT with only scalars. We test this sharpened version of Dynamical Cobordism against several examples\, such as massive IIA string theory\, where it is notably compatible with the presence of O8-planes; the Janis-Newman-Winicour and Garfinkle-Horowitz-Strominger black hole solutions; and certain singular distributions of D-branes. In all these cases\, the Sharpened Dynamical Cobordism Conjecture leads to results consistent with our expectations.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-sharpened-dynamical-cobordism/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260603T150000
DTEND;TZID=Europe/Madrid:20260603T163000
DTSTAMP:20260713T233123
CREATED:20260220T111829Z
LAST-MODIFIED:20260602T141751Z
UID:24426-1780498800-1780504200@www.ift.uam-csic.es
SUMMARY:IFT Colloquium: Matthew Headrick (Brandeis & IHES)
DESCRIPTION:Venue&Time: Blue Room / 15:00 \nCoffee will be served in the cafeteria at 16:15h \nTitle: ‘Black holes\, quantum entanglement\, and the geometry of spacetime’ \nSpeaker: Matthew Headrick (Brandeis & IHES) \nAbstract: Black holes are by far the most entropic objects in the universe\, and their enormous entropy directly connects the macroscopic world governed by general relativity to the Planck scale governed by quantum gravity. It turns out that they are just a piece of a much larger and richer story\, hinting that\, despite the notorious difficulty of quantizing gravity\, quantum mechanics and general relativity are actually two sides of the same coin. I’ll explain these connections\, and along the way try to answer the question: Is Newton’s constant really equal to 1?
URL:https://www.ift.uam-csic.es/event/colloquium-matthew-headrick-brandeis-ihes/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Colloquia,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260603T113000
DTEND;TZID=Europe/Madrid:20260603T123000
DTSTAMP:20260713T233123
CREATED:20260529T082527Z
LAST-MODIFIED:20260602T141630Z
UID:25123-1780486200-1780489800@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Polynomial-time thermalization and Gibbs sampling from system-bath couplings'
DESCRIPTION:Title: ‘Polynomial-time thermalization and Gibbs sampling from system-bath couplings’\n\nSpeaker: Sam Slezak (ENS Lyon)\n\nVenue&Time: Gray Room 3 / 11:30\n\nAbstract: Many physical phenomena\, including thermalization in open quantum systems and quantum Gibbs sampling\, are modeled by Lindbladians approximating a system weakly coupled to a bath. Understanding the convergence speed of these Lindbladians to their steady states is crucial for bounding algorithmic runtimes and thermalization timescales. We study two such families of processes: one characterizing a repeated-interaction Gibbs sampling algorithm\, and another modeling open many-body quantum thermalization. We prove that both converge in polynomial time for several non-commuting systems\, including high-temperature local lattices\, weakly interacting fermions\, and 1D spin chains. These results demonstrate that simple dissipative quantum algorithms can prepare complex Gibbs states and that Lindblad dynamics accurately capture thermal relaxation. Our proofs rely on a novel technical result that extrapolates spectral gap lower bounds from quasi-local Lindbladians to the non-local generators governing these dynamics.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-polynomial-time-thermalization-and-gibbs-sampling-from-system-bath-couplings/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260602T150000
DTEND;TZID=Europe/Madrid:20260602T160000
DTSTAMP:20260713T233123
CREATED:20260527T141356Z
LAST-MODIFIED:20260603T093853Z
UID:25107-1780412400-1780416000@www.ift.uam-csic.es
SUMMARY:A diffuse flux of MeV ALPs
DESCRIPTION:Title: ‘A diffuse flux of MeV ALPs’ \nSpeaker: Marina Cermeño \nVenue&Time: Red Room / 15:00 \nAbstract: MeV scale axion-like particles can be produced with semi-relativistic velocities in Galactic supernovae\, leading to a diffuse flux that can be detectable in neutrino water-Cherenkov detectors (Super + HyperK). In this talk\, I will explain the details of the calculation that we recently did in 2602.17597 also with some content from our previous works 2412.09595 \, 2412.19890) \n 
URL:https://www.ift.uam-csic.es/event/a-diffuse-flux-of-mev-alps/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260602T140000
DTEND;TZID=Europe/Madrid:20260602T150000
DTSTAMP:20260713T233123
CREATED:20260406T092426Z
LAST-MODIFIED:20260406T092426Z
UID:24831-1780408800-1780412400@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-28/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260602T113000
DTEND;TZID=Europe/Madrid:20260602T130000
DTSTAMP:20260713T233123
CREATED:20260527T130818Z
LAST-MODIFIED:20260527T130956Z
UID:25101-1780399800-1780405200@www.ift.uam-csic.es
SUMMARY:Holo-Club: From Volume as a Clock to Boundary Dynamics in JT Gravity
DESCRIPTION:Title: From Volume as a Clock to Boundary Dynamics in JT Gravity \nSpeaker: Farbod-Sayyed Rassouli (University of Nottingham) \nVenue&Time: 11:30 / Blue Room \nAbstract: \nDifferent notions of time arise from different choices of observer. In cosmological settings\, a particularly natural choice is the spacetime volume\, which is conjugate to the cosmological constant. This leads to a notion of unimodular time that deparametrizes the Wheeler–DeWitt equation into a Schrödinger-like evolution equation\, while also inducing a natural time variable at the boundary. In this talk\, I will first explain how this construction arises in arbitrary dimension\, with particular emphasis on the 4D case. I will then turn to Jackiw–Teitelboim gravity\, where promoting the vacuum cosmological constant to a dynamical top-form degree of freedom provides a bulk clock in the Henneaux–Teitelboim sense. On the boundary\, this modifies the usual Schwarzian dynamics by coupling it to an additional U(1) phase mode\, reproducing the universal low-energy structure familiar from complex SYK. I will show how the corresponding boundary theory can itself be rewritten as a (0+1)-dimensional observer action\, making explicit the relation between the bulk volume clock and its holographic boundary counterpart. \narXiv:2601.07911
URL:https://www.ift.uam-csic.es/event/holo-club-from-volume-as-a-clock-to-boundary-dynamics-in-jt-gravity/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260601T150000
DTEND;TZID=Europe/Madrid:20260601T160000
DTSTAMP:20260713T233123
CREATED:20260220T111708Z
LAST-MODIFIED:20260529T082233Z
UID:24424-1780326000-1780329600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Classical Krylov probes and chaotic semiclassical strings'
DESCRIPTION:Title: ‘Classical Krylov probes and chaotic semiclassical strings’ \nSpeaker: Saskia Demulder (CUNEF) \nVenue&Time: Red Room / 15:00 \nAbstract: Quantum chaos is a central theme in string theory\, but classical chaos is also a generic feature of semiclassical string dynamics. Motivated by the need to explore the broad landscape of non-integrable string dynamics\, I will introduce a classical version of Krylov complexity and related diagnostics using the Koopman-von Neumann formulation of classical mechanics. I will then explain how this framework can be applied to integrability-breaking deformations of otherwise integrable semiclassical string solutions. In particular\, I will show how such deformations induce characteristic redistributions of spectral weight\, leading to observable-dependent delocalisation and spreading in Koopman-Krylov space. This talk is based on [2602.23421] and ongoing work\, both in collaboration with Rathindra N. Das.
URL:https://www.ift.uam-csic.es/event/seminar-by-saskia-demulder-cunef/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260528T150000
DTEND;TZID=Europe/Madrid:20260528T160000
DTSTAMP:20260713T233123
CREATED:20260330T092531Z
LAST-MODIFIED:20260330T092531Z
UID:24676-1779980400-1779984000@www.ift.uam-csic.es
SUMMARY:Seminar by Marco Finetti (U. Aveiro)
DESCRIPTION:Title: ‘First Order Phase Transitions and Gravitational Waves’ \nVenue&Time: Red Room / 15:00 \nSpeaker: Marco Finetti (U. Aveiro) \nAbstract: The Laser Interferometer Space Antenna (LISA) will be the first space-based gravitational wave (GW) detector\, opening a new observational window for both astrophysics and early-Universe cosmology. Operating in the millihertz band\, it will probe a rich superposition of GW signals. Astrophysical population models predict a sufficient number of signals in the LISA band to blend together and form an irresolvable Galactic foreground noise. In addition\, a stochastic gravitational wave background (SGWB) of cosmological origin could add an unknown component to the measured noise. In this talk\, I will assess the bias induced on the parameter estimation of stochastic signals\, arising from the unresolved binaries buried within the cosmological signal. Using a representative SGWB model\, I will quantify the impact of this effect on the reconstruction of the foreground template parameters and\, most importantly\, on those of the SGWB model itself. Neglecting inter-template correlations can lead to significan biases\, and\, for several benchmark cases\, those biases exceed the statistical reconstruction uncertainties. These findings expose a key limitation of existing template-based strategies and indicate that unbiased component separation will likely require additional information\, such as constraints from resolved sources obtained through global-fit analyses.
URL:https://www.ift.uam-csic.es/event/seminar-by-marco-finetti-u-aveiro/
LOCATION:Madrid
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260528T120000
DTEND;TZID=Europe/Madrid:20260528T130000
DTSTAMP:20260713T233123
CREATED:20260525T061812Z
LAST-MODIFIED:20260525T061812Z
UID:25091-1779969600-1779973200@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 2.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-15/
LOCATION:Grey Room 2\, Instituto de Física Teórica\, Madrid\, Madrid\, 28037\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260528T120000
DTEND;TZID=Europe/Madrid:20260528T130000
DTSTAMP:20260713T233123
CREATED:20260525T061614Z
LAST-MODIFIED:20260525T061614Z
UID:25089-1779969600-1779973200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Heterotic Ouroboros
DESCRIPTION:Strings\, Pheno and the Swampland (SPS) Journal Club \n\nTitle: Heterotic Ouroboros\n\nSpeaker: Chiara Altavista (IFT)\n\nVenue&Time: Red Room / 12:00\n\nAbstract: M-theory on {\mathbf{S}}^1\vee{\mathbf{S}}^1 has recently been proposed to yield\, via quotients\, ten-dimensional non-supersymmetric string theories. We revisit the construction that leads to the heterotic theories\, finding a consistent set of rules that reproduces the light spectra and gauge groups\, including indications of their global structure. Our approach uses the gauge enhancement mechanism of type I’ string theory\, applied to a setting in which the type I’ interval is curled onto itself\, with its two boundaries separated by a branch cut. Using these tools\, we reproduce the ten-dimensional heterotic theories and provide some evidence for junctions among them.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-heterotic-ouroboros/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260526T140000
DTEND;TZID=Europe/Madrid:20260526T150000
DTSTAMP:20260713T233123
CREATED:20260406T091911Z
LAST-MODIFIED:20260406T092042Z
UID:24821-1779804000-1779807600@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-27/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260525T150000
DTEND;TZID=Europe/Madrid:20260525T160000
DTSTAMP:20260713T233123
CREATED:20260520T084237Z
LAST-MODIFIED:20260525T122737Z
UID:25075-1779721200-1779724800@www.ift.uam-csic.es
SUMMARY:Seminar: 'Weak Particles with a strong impact'
DESCRIPTION:Title: ‘Weak Particles with a strong impact’ \nSpeaker: Aritra Gupta (Krea University\, India) \nVenue&Time: Red Room / 15:00 \nAbstract: Dark matter and neutrinos are among the most elusive particles in nature\, yet they play a central role in the evolution of the Universe. Their extremely weak interactions make them difficult to detect\, but also allow them to probe environments inaccessible to ordinary matter. \nIn this colloquium\, I will discuss how astrophysical systems and neutrino observatories can be used to explore the physics of dark matter and neutrinos beyond the Standard Model. I will present scenarios where dark matter and neutrino physics are intimately connected\, leading to observable consequences in cosmology and astroparticle experiments. I will also discuss how dark matter accumulated inside compact stellar environments can significantly modify supernova cooling along with other detectable indirect signatures. Throughout the talk\, I will highlight how compact stars\, neutrino detectors\, and astrophysical observations together provide new windows into the dark sector.
URL:https://www.ift.uam-csic.es/event/seminar-weak-particles-with-a-strong-impact/
LOCATION:Madrid
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260522T110000
DTEND;TZID=Europe/Madrid:20260522T120000
DTSTAMP:20260713T233123
CREATED:20260518T082354Z
LAST-MODIFIED:20260518T082443Z
UID:25061-1779447600-1779451200@www.ift.uam-csic.es
SUMMARY:World Day for Cultural Diversity Celebration
DESCRIPTION:Thursday May21st and Friday May 22nd (during the usual coffee time). Both in the cafeteria\n\nThe EDI committee is hosting a small event this coming week to celebrate May 21st as the World Day for Cultural Diversity for Dialogue and Development\, recognized by the UN and UNESCO.\n\nThursday:\nWorld map set up with pins and flags to mark our coubtries of origin\n\nFriday\nInternational potluck during Friday coffee.\n\nWhoever feels inspired can bring a small dish\, snack\, appetizer\, or dessert to share – ideally something representative of their own culture or country—so we can all enjoy and discover flavors from around the world together.
URL:https://www.ift.uam-csic.es/event/world-day-for-cultural-diversity-celebration/
LOCATION:Cafeteria (ground floor)
CATEGORIES:Scientific culture
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260521T150000
DTEND;TZID=Europe/Madrid:20260521T160000
DTSTAMP:20260713T233123
CREATED:20260206T110232Z
LAST-MODIFIED:20260518T073544Z
UID:24351-1779375600-1779379200@www.ift.uam-csic.es
SUMMARY:Seminar: 'Exploring Effective Theories of Gauged Chiral Symmetries at the LHC and Beyond'
DESCRIPTION:Title: Exploring Effective Theories of Gauged Chiral Symmetries at the LHC and Beyond \nSpeaker: Felix Yu (Mainz U.) \nVenue & Time: Red Room / 15:00 \nAbstract: I discuss theoretical issues with constructing effective theories of gauged chiral symmetries\, taking a quark-universal U(1)_B symmetry as an example.  I will review the phenomenology of the Z-Z’-photon vertex and point out novelties regarding a non-renormalization theorem and connections to electroweak loop calculations and dimensional regularization. I also present the collider signatures from the exotic scalar sector and the characteristic nature of non-decoupling chiral matter.
URL:https://www.ift.uam-csic.es/event/seminar-by-felix-yu-mainz-u/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260521T120000
DTEND;TZID=Europe/Madrid:20260521T130000
DTSTAMP:20260713T233123
CREATED:20260518T081511Z
LAST-MODIFIED:20260518T081511Z
UID:25059-1779364800-1779368400@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Generalised anomalies\, QCD\, and holography'
DESCRIPTION:Title: ‘Generalised anomalies\, QCD\, and holography’ \nSpeaker: Mohammad Akhond (Dipartimento di Fisica & INFN\, Università di Roma  “Tor Vergata”) \nVenue & Time: Red Room / 12:00 \nAbstract: During the last decade\, the notion of an ‘t Hooft anomaly has been generalised to the case of discrete symmetries. An interesting instance\, discussed by Tanizaki\, is the mixed anomaly between the discrete axial symmetry and the flavour and baryonic symmetries in massless QCD. The goal of this talk is to provide a derivation of this anomaly from a top-down holographic dual of QCD. I will show that the topological couplings in the bulk supergravity dual of the D4-D8 system encode Tanizaki’s anomaly\, once fluctuations around the bulk gauge fields are turned on. A technical challenge for this computation is the difficulty in maintaining gauge invariance of supergravity theories in the presence of D-branes. To overcome this issue\, a compact formulation of the flux sector of (massive) type IIA supergravity in the presence of D8 branes is presented.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-generalised-anomalies-qcd-and-holography/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260521T120000
DTEND;TZID=Europe/Madrid:20260521T130000
DTSTAMP:20260713T233123
CREATED:20260518T073652Z
LAST-MODIFIED:20260518T073805Z
UID:25057-1779364800-1779368400@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 2. \n \n 
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-14/
LOCATION:Grey Room 2\, Instituto de Física Teórica\, Madrid\, Madrid\, 28037\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260520T113000
DTEND;TZID=Europe/Madrid:20260520T123000
DTSTAMP:20260713T233123
CREATED:20260512T084922Z
LAST-MODIFIED:20260518T073317Z
UID:25038-1779276600-1779280200@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Optimal strategies for near-term simulation of fermionic systems with scalable local fermion-to-qubit mappings'
DESCRIPTION:Title: ‘Optimal strategies for near-term simulation of fermionic systems with scalable local fermion-to-qubit mappings’\n\nSpeaker: Manuel G. Algaba\n\nVenue&Time: Gray Room 3 / 11:30\n\nAbstract: Quantum simulation of interacting fermions remains one of the most compelling applications of quantum computing\, but its practical realization depends on more than the asymptotic promise of fault-tolerant quantum algorithms. To bridge the gap with current NISQ devices\, we derive a strategy for growing the corresponding code distance of local fermion-to-qubit mappings\, which is otherwise fixed. Building upon the extended error detection properties of these mappings we present a quantum error mitigation (QEM) technique tailored for fermionic systems which outperforms other widely used techniques such as Post-selection\, Virtual Distillation\, and Probabilistic Error Cancellation in regimes of practical interest. We then study the performance of different combinations of QEM and fermion-to-qubit mappings and identify the best combination of mapping and QEM. This study enables us to derive minimal hardware requirements for the simulation of Fermi-Hubbard models of various sizes in near-term devices.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-optimal-strategies-for-near-term-simulation-of-fermionic-systems-with-scalable-local-fermion-to-qubit-mappings/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260519T140000
DTEND;TZID=Europe/Madrid:20260519T150000
DTSTAMP:20260713T233123
CREATED:20260406T091843Z
LAST-MODIFIED:20260406T091843Z
UID:24820-1779199200-1779202800@www.ift.uam-csic.es
SUMMARY:Cosmology Journal Club
DESCRIPTION:Every Tuesday at 2:00 PM in the discussion room on the 5th floor. \nJoin the IFT cosmology/gravity journal club at benty-fields.com to vote for papers and volunteer to present them \n \n 
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-26/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260518T150000
DTEND;TZID=Europe/Madrid:20260518T160000
DTSTAMP:20260713T233123
CREATED:20251128T155105Z
LAST-MODIFIED:20260504T100633Z
UID:23975-1779116400-1779120000@www.ift.uam-csic.es
SUMMARY:Seminar: 'On the evidence for elastic interactions in the dark sector'
DESCRIPTION:Title: ‘On the evidence for elastic interactions in the dark sector’ \nSpeaker: Jose Beltrán Jiménez\, University of Salamanca. \nVenue & Time: Red Room / 15:00 \nAbstract: The increasing quality of cosmological data has revealed > some tensions among different probes that could be signalling the necessity of incorporating new physics into our cosmological model. One particularly intriguing possibility is the existence of elastic interactions between dark matter and dark energy. Not only do these interactions provide a natural mechanism to relief cosmological tensions\, but there is also compelling observational evidence for them\, to the extent that a detection could even be claimed. I wil review the potential of these scenarios in relation to the cosmological tensions and discuss distinctive signatures that can be probed with future data\, thus providing a smoking gun for these interactions.
URL:https://www.ift.uam-csic.es/event/seminar-by-jose-beltran-salamanca/
LOCATION:IFT Seminar Room/Red Room\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260514T150000
DTEND;TZID=Europe/Madrid:20260514T183000
DTSTAMP:20260713T233123
CREATED:20260504T083135Z
LAST-MODIFIED:20260512T135216Z
UID:24973-1778770800-1778783400@www.ift.uam-csic.es
SUMMARY:Hasta la Física y Más Allá – Próxima parada\, el futuro
DESCRIPTION:Cuatro charlas breves sobre investigación puntera\, futuro y salidas profesionales.\n\n\n\n\n\nLos ponentes son personas que han seguido caminos variados dentro de la Física. Este evento es una oportunidad para conocer experiencias reales en la carrera investigadora –y fuera de ella–\, descubrir ciencia puntera\, opciones que quizá no te habías planteado y hacerte una idea de lo que puede venir después. \n \n\nCUÁNDO Y DÓNDE\nJueves\, 14 de mayo. \nEn el auditorio del Instituto de Física Teórica (IFT UAM-CSIC). Calle Nicolás Cabrera 13-15\, Campus de Cantoblanco\, Madrid. \nEl evento comienza a las 15:00 / Apertura de puertas: 14:45 \n\nCÓMO REGISTRARSE\nAdquiere tu entrada gratuita en el siguiente enlace: https://www.eventbrite.es/e/hasta-la-fisica-y-mas-alla-proxima-parada-el-futuro-tickets-1988153459517\n\n \n\n\nPROGRAMA\n\n15:00 – Bienvenida\, por Ana R. Cueto (UAM). \n15:15 – ‘El potencial del Higgs: un puente entre la física de partículas y la cosmología’ por Kateryna Radchenko (IFT UAM-CSIC) \nDurante las próximas décadas seremos testigos de una recolección de datos sin precedentes en la física de partículas. Por un lado\, el colisionador de hadrones del CERN entrará en su fase de alta luminosidad\, ampliando nuestra capacidad de explorar las interacciones a energías cada vez mayores. Por otro\, misiones como LISA inaugurarán la astronomía de ondas gravitacionales del universo temprano. Estos datos podrán arrojar luz sobre algunas de las preguntas más intrigantes que siguen abiertas en el Modelo Estándar. En muchas de ellas\, el potencial del campo de Higgs juega un papel central. Su forma puede estudiarse en colisionadores\, donde se accede a su estructura actual\, y mediante observaciones cosmológicas\, que permiten reconstruir su evolución en los primeros instantes del universo. En esta charla veremos cómo estos dos enfoques\, aparentemente muy distintos\, se complementan para construir un puente entre la física de partículas y la cosmología. \n16:00 – ‘Física del Machine Learning’ por Beatriz Seoane Bartolomé (UCM) \nEl aprendizaje automático está transformando nuestra capacidad para explotar y analizar datos complejos\, pero sigue funcionando en gran medida como una “caja negra” difícil de interpretar. En muchos casos\, ni siquiera se comprende bien desde un punto de vista teórico cuáles son sus mecanismos internos ni por qué funcionan tan bien\, lo que dificulta su uso responsable. En esta charla discutiré cómo la física\, y en particular la física estadística\, está emergiendo como una herramienta fundamental para cambiar de perspectiva y abordar su comprensión. Veremos que las redes neuronales pueden entenderse de manera natural como sistemas de espines que codifican la información mediante interacciones entre muchas variables\, de modo que propiedades como la memoria asociativa o la generación de nuevos datos no son otra cosa que fenómenos emergentes de un sistema complejo. Desde este punto de vista\, el aprendizaje deja de ser un proceso opaco y puede describirse en términos de transiciones de fase\, mientras que el papel\, y la optimización\, de los hiperparámetros surge de forma natural al estudiar los diagramas de fase del modelo. Esto no solo permite entender mejor cómo funcionan estos sistemas\, sino también identificar sus limitaciones y diseñar estrategias más eficientes. En conjunto\, esta forma de mirar el aprendizaje automático desde la física abre una vía para desarrollar modelos más interpretables\, más eficientes desde el punto de vista energético y mejor fundamentados para extraer información de sistemas complejos. \n16:45 – ‘Agujeros negros y fisica fundamental’ por José L. F. Barbón (IFT UAM-CSIC) \nQué son los agujeros negros y por qué llevan al límite a nuestras teorías fundamentales \n17:30 – Gala SPIN \nBreve reconocimiento a los estudiantes de prácticas del curso 2025–2026. Introducción a cargo de Ángel M. Uranga Urteaga (IFT UAM-CSIC). \n17:45 – ‘Cinco cosas que debes saber sobre el universo’ por José Luis Crespo (Quantum Fracture) \nConceptos como Lambda CDM y más\, explicados de la mano del reconocido divulgador. \n18:30 – Merienda de picoteo en la cafetería del IFT.
URL:https://www.ift.uam-csic.es/event/hasta-la-fisica-y-mas-alla-proxima-parada-el-futuro/
LOCATION:IFT Auditorium\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\,\, Spain
CATEGORIES:Outreach events,Scientific culture
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260514T120000
DTEND;TZID=Europe/Madrid:20260514T130000
DTSTAMP:20260713T233123
CREATED:20260511T081149Z
LAST-MODIFIED:20260511T081149Z
UID:25036-1778760000-1778763600@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 2.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-13/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260514T120000
DTEND;TZID=Europe/Madrid:20260514T130000
DTSTAMP:20260713T233123
CREATED:20260330T090749Z
LAST-MODIFIED:20260513T152425Z
UID:24670-1778760000-1778763600@www.ift.uam-csic.es
SUMMARY:Seminar: 'Perturbative aspect of electroweak phase transitions in the Early Universe'
DESCRIPTION:Title: ‘Perturbative aspect of electroweak phase transitions in the Early Universe’\n\n\n\nSpeaker: Andrii Dashko (DESY)\n\n\nVenue&Time: Blue Room / 12:00\n\n\nAbstract: We present a study of the perturbative description of thermally driven electroweak phase transitions (EWPT) in the early universe. Focusing on strong first-order transitions\, which are relevant for gravitational wave cosmology\, we examine the dimensional reduction as a tool for a precise and systematic description focusing on the running of effective parameters within the effective field theory (EFT)\, and the impact of higher-dimensional operators. This allows us to assess the range of validity and theoretical uncertainties of the EFT approach. We demonstrate these results with applications to the Standard Model Effective Field Theory (SMEFT) and singlet extensions of the Standard Model\, both of which can realize strong EWPT.
URL:https://www.ift.uam-csic.es/event/seminar-by-andrii-dashko-desy/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
END:VCALENDAR