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X-WR-CALDESC:Events for Instituto de Física Teórica
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260218T113000
DTEND;TZID=Europe/Madrid:20260218T123000
DTSTAMP:20260722T085342
CREATED:20260216T083243Z
LAST-MODIFIED:20260216T085842Z
UID:24395-1771414200-1771417800@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Quantum Algorithms Based on Cooling'
DESCRIPTION:Date: Wednesday\, February 18 \nAula Gris 2 / 11:30 \nSpeaker: Daniel Molpeceres (TU Munich) \nTítulo: Quantum Algorithms Based on Cooling \nAbstract: The purpose of this work is to study different methods for nature-inspired algorithmic cooling of physical systems\, which rely on energy transfer between the system and a cool bath. These algorithms are suitable for preparation of QMB ground states\, and are therefore an alternative to other well-known procedures such as variational or adiabatic algorithm\, which have their own limitations. The aim of the paper is to develop this theory\, and try to find in what regimes it works best\, such that it can be used as an alternative or in collaboration with the previous methods. We will focus on a free-fermion model with hoppings in a 1D lattice and a certain distribution of auxiliary systems per site\, try to find regimes in which the system reaches the ground state\, and then extrapolate what we learn from this model into a more general noisy setting. The main questions to address are how the performance changes with the noise that may appear in an experimental setting\, as well as a comparison with other methods such as adiabatic algorithm or QAOA.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-quantum-algorithms-based-on-cooling/
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:20260217T140000
DTEND;TZID=Europe/Madrid:20260217T150000
DTSTAMP:20260722T085342
CREATED:20260216T083930Z
LAST-MODIFIED:20260216T083930Z
UID:24402-1771336800-1771340400@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-14/
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:20260217T113000
DTEND;TZID=Europe/Madrid:20260217T130000
DTSTAMP:20260722T085342
CREATED:20260209T081242Z
LAST-MODIFIED:20260209T081341Z
UID:24366-1771327800-1771333200@www.ift.uam-csic.es
SUMMARY:Holo-Club: 'Toward Krylov-based holography in double-scaled SYK'
DESCRIPTION:Speaker: Yichao Fu (GIST)\n\nTitle: Toward Krylov-based holography in double-scaled SYK\n\nVenue & Time: Gray Room 3 / 11:30\n\nAbstract:\n\nBuilding on the duality between Krylov complexity and geodesic length in Jackiw-Teitelboim and sine-dilaton gravity\, we develop a precise holographic dictionary for quantities in the Krylov subspace of the double-scaled Sachdev-Ye-Kitaev model (DSSYK). First\, we demonstrate that the growth rate of Krylov state complexity corresponds to the wormhole velocity\, and show that its expectation value in coherent states serves as a boundary diagnostic of firewall-like structures via bulk reconstruction. We also delineate an alternative bulk description in terms of the proper momentum of an infalling particle at early times\, establishing a threefold duality between the Krylov complexity growth rate\, wormhole velocity\, and proper momentum\, with clear regimes of validity. Beyond the first moments\, we argue that higher-order Krylov complexities capture connected bulk contributions encoded by replica wormholes\, while the logarithmic variant probes the replica saddle structure. Finally\, within a third-quantized setting incorporating baby universes\, we show that the Krylov entropy equals the von Neumann entropy of the parent-geometry density matrix obtained after tracing out baby universes\, thereby quantifying information flow into the baby universe sector. Together\, these results elevate Krylov-space observables to sharp probes of bulk dynamics and topology in ensemble-averaged 2D gravity.
URL:https://www.ift.uam-csic.es/event/holo-club-toward-krylov-based-holography-in-double-scaled-syk/
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:20260212T170000
DTEND;TZID=Europe/Madrid:20260212T180000
DTSTAMP:20260722T085342
CREATED:20260209T072454Z
LAST-MODIFIED:20260209T073132Z
UID:24353-1770915600-1770919200@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Supersymmetry and morse theory'
DESCRIPTION:Chuying Wang (IFT) will present ‘Supersymmetry and morse theory’ by Edward Witten J. DIFFERENTIAL GEOMETRY 17 (1982) 661-692 \nVenue & Time: Blue Room / 17:00 \nAbstract:  \n  It is shown that the Morse inequalities can be obtained by consideration of a certain supersymmetric quantum mechanics Hamiltonian. Some of the implications of modern ideas in mathematics for supersymmetric theories are discussed.  \nMore info: https://projecteuclid.org/journals/journal-of-differential-geometry/volume-17/issue-4/Supersymmetry-and-Morse-theory/10.4310/jdg/1214437492.pdf
URL:https://www.ift.uam-csic.es/event/old-journal-club-supersymmetry-and-morse-theory/
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:20260212T120000
DTEND;TZID=Europe/Madrid:20260212T130000
DTSTAMP:20260722T085342
CREATED:20260209T073012Z
LAST-MODIFIED:20260209T073012Z
UID:24361-1770897600-1770901200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Hilltop quintessence\, the LARGE Volume Scenario and varying-tension cosmic strings'
DESCRIPTION:Léo Veissière (IFT) will present:\n\n‘Hilltop quintessence\, the LARGE Volume Scenario and varying-tension cosmic strings’\n\nVenue & Time: Red Room / 12:00\n\nRecent observational data suggests that the dark energy equation of state parameter wDE is evolving with time\, in apparent tension with the ΛCDM standard model of cosmology. Here we review these observational results\, with particular emphasis on the evidence for phantom-like behaviour\, for which wDE < −1. In an attempt to reproduce the data\, we study a quintessence model of a single scalar field rolling down a hilltop potential\, both from a UV-agnostic perspective and from a string theory point-of-view. For the latter we focus on a scalar potential derived from type IIB supergravity in the context of the LARGE Volume Scenario (LVS)\, and investigate the cosmological dynamics of the scalar near its maximum. Finally\, we discuss whether an effective phantom behaviour can be reproduced by considering the interaction between the scalar field and cosmic strings with a time-dependent tension\, while keeping the LVS scalar potential unchanged.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-hilltop-quintessence-the-large-volume-scenario-and-varying-tension-cosmic-strings/
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:20260212T120000
DTEND;TZID=Europe/Madrid:20260212T130000
DTSTAMP:20260722T085342
CREATED:20260209T072820Z
LAST-MODIFIED:20260209T073110Z
UID:24358-1770897600-1770901200@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes'
DESCRIPTION:Yuber Perez-Gonzalez (IFT) will present:\n\n‘The Cosmic Neutrino Background is within Reach of Future Neutrino Telescopes’\n\nVenue & Time: Gray Room 3 / 12:00\n\nAbstract: The cosmic neutrino background (CνB) can be boosted to high energies due to scatterings with energetic cosmic rays (CRs) across cosmological scales. Previous calculations focused on neutral current incoherent and coherent elastic scatterings of cosmic-ray protons off relic neutrinos. However\, charged current interactions and deep inelastic scatterings are also expected to occur\, which enhances the boosted relic neutrino fluxes on Earth. Here\, we compute the \textit{total} diffuse boosted cosmic neutrinobackground (DBCνB) arising from CRs at all redshifts in the Universe\, accounting for neutral current and charged current elastic and deep inelastic scatterings. We find that IceCube already places an upper limit on the cosmic neutrino background overdensity in cosmological scales of ~O(100−1000) at Eν=10^10 GeV\, for a lightest neutrino mass of mν≳0.1 eV. We further show that IceCube-Gen2 could test O(1−10) CνB overdensities\, and the combination of 10 future neutrino telescopes with similar sensitivity would allow us to test the ΛCDM expected CνB density for a lightest neutrino mass compatible with the KATRIN bound.\n\nBased on 2601.09790.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-the-cosmic-neutrino-background-is-within-reach-of-future-neutrino-telescopes/
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:20260210T140000
DTEND;TZID=Europe/Madrid:20260210T150000
DTSTAMP:20260722T085342
CREATED:20260209T072642Z
LAST-MODIFIED:20260209T072653Z
UID:24356-1770732000-1770735600@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 
URL:https://www.ift.uam-csic.es/event/cosmology-journal-club-13/
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:20260210T113000
DTEND;TZID=Europe/Madrid:20260210T130000
DTSTAMP:20260722T085342
CREATED:20260123T115715Z
LAST-MODIFIED:20260123T115715Z
UID:24284-1770723000-1770728400@www.ift.uam-csic.es
SUMMARY:Holo Club: 'Holographic fluids with higher-form symmetries'
DESCRIPTION:Title: Holographic fluids with higher-form symmetries\n\nSpeaker: André Oliveira (Heriot-Watt University)\n\nVenue & Time: Grey Room 3 / 11:30\n\nAbstract: Higher-form symmetries are ubiquitous in physics. In this talk\, I focus on the case where they are continuous and encode the conservation of extended objects. Applications include elasticity\, superfluidity and phases of electromagnetism. Using holography\, we explore effective descriptions of systems with the simplest case of a single higher-form symmetry. For energies well below temperature\, these descriptions admit a (potentially extended) hydrodynamic regime. We verify this explicitly by studying AlAdS black branes charged under higher-form potentials. In particular\, we compute quasinormal modes\, starting with the low-density limit. Then\, we focus on the bulk dual of a viscoelastic system and analyse instabilities for different equilibrium states corresponding to isotropic crystalline phases.
URL:https://www.ift.uam-csic.es/event/holo-club-holographic-fluids-with-higher-form-symmetries/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260205T170000
DTEND;TZID=Europe/Madrid:20260205T180000
DTSTAMP:20260722T085342
CREATED:20260202T155203Z
LAST-MODIFIED:20260202T155423Z
UID:24334-1770310800-1770314400@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Threshold production of heavy top quarks: QCD and the Higgs boson'
DESCRIPTION:Sergio Rodríguez (IFT) will present “Threshold production of heavy top quarks: QCD and the Higgs boson” by Matthew J. Strassler and Michael E. Peskin. \nAbstract:  \nWe calculate the threshold cross section for 𝑒+𝑒−→tt¯ to leading-logarithmic order in QCD\, using a nonrelativistic approximation suggested by Fadin and Khoze. We study the mass range 100≤𝑚𝑡≤250 GeV\, and show that the cross section is an excellent measure of α𝑠 for the lower portion of the mass range\, while for a heavier top quark it is sensitive to the mass and couplings of the Higgs boson. We argue that a precise determination of 𝑚𝑡 and a measurement of Γ𝑡 are possible. We also show that nonperturbative effects are small\, confirming that the tt¯ threshold is a detailed perturbative test of the standard model. \nMore info: https://journals.aps.org/prd/pdf/10.1103/PhysRevD.43.1500
URL:https://www.ift.uam-csic.es/event/old-journal-club-threshold-production-of-heavy-top-quarks-qcd-and-the-higgs-boson/
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:20260205T121500
DTEND;TZID=Europe/Madrid:20260205T131500
DTSTAMP:20260722T085342
CREATED:20260202T073428Z
LAST-MODIFIED:20260202T073428Z
UID:24329-1770293700-1770297300@www.ift.uam-csic.es
SUMMARY:Strings\, Pheno and the Swampland (SPS) Journal Club
DESCRIPTION:Every Thursday at 12:00 in the Red Room.
URL:https://www.ift.uam-csic.es/event/strings-pheno-and-the-swampland-sps-journal-club/
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:20260205T120000
DTEND;TZID=Europe/Madrid:20260205T130000
DTSTAMP:20260722T085342
CREATED:20260202T072706Z
LAST-MODIFIED:20260202T072706Z
UID:24327-1770292800-1770296400@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 3.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-6/
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:20260204T113000
DTEND;TZID=Europe/Madrid:20260204T123000
DTSTAMP:20260722T085342
CREATED:20260202T071236Z
LAST-MODIFIED:20260202T071236Z
UID:24321-1770204600-1770208200@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: Continuous and field tensor network states
DESCRIPTION:Speaker: Albert Gasull\, Leiden University\n\nVenue & Time: Grey Room 3 / 11:30\n\nTitle: ‘Continuous and field tensor network states’\nAbstract: Tensor network methods have provided us with a powerful set of tools with which to study strongly interacting many-body systems on the lattice. Understanding the limitations of this ansatz is paramount for the success of both numerical algorithms and exact analytical representations of the many-body wavefunction. In recent years\, several generalizations making use of different notions of the continuum have appeared in the literature to tackle such different limitations. Firstly\, continuous tensor network states (cTNS) is an ansatz that allows us to work directly in the continuum to answer questions related to quantum field theories\, removing the need for sending the lattice spacing to zero in standard tensor network approaches. Secondly\, field tensor network states (fTNS) aim to provide an exact tensor network approach to the analytical description of chiral gapped topological states in two spatial dimensions\, such as the Laughlin wavefunction. While these states had been previously considered to be out of reach for the most prominent two dimensional tensor network\, projected entangled pair states\, by upgrading the virtual space of the network to an infinite dimensional one\, we circumvent the previous no-go theorems to provide the first exact representations. In this talk\, I will present an overview of both cTNS and fTNS. I will present the main ideas behind both generalizations and relation to quantum field theories. I will also showcase some of the applications that we are currently working on\, as well as some of the problems that one encounters along the way. This talk is based on both published and ongoing work with Arkadiusz Bochniak\, Germán Sierra and Ignacio Cirac.
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-continuous-and-field-tensor-network-states/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260203T140000
DTEND;TZID=Europe/Madrid:20260203T150000
DTSTAMP:20260722T085342
CREATED:20260202T072324Z
LAST-MODIFIED:20260202T072324Z
UID:24324-1770127200-1770130800@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-12/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T170000
DTEND;TZID=Europe/Madrid:20260129T180000
DTSTAMP:20260722T085342
CREATED:20260123T120447Z
LAST-MODIFIED:20260123T120531Z
UID:24288-1769706000-1769709600@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Topological Quantization and Cohomology'
DESCRIPTION:Gonzalo F. Casas (IFT) will present ‘Topological Quantization and Cohomology‘ by Orlando Álvarez  Commun.Math.Phys. 100 (1985) 279 \nAbstract:  \nThe relationships between topological charge quantization\,Lagrangians and various cohomology theories are studied. A very general criterion for charge quantization is developed andapplied to various physical models. The relationship betweencohomology and homotopy is discussed. \nMore info: https://inspirehep.net/literature/206164
URL:https://www.ift.uam-csic.es/event/old-journal-club-topological-quantization-and-cohomology/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs,Scientific activities
ATTACH;FMTTYPE=image/png:https://www.ift.uam-csic.es/wp-content/uploads/2026/01/OJC_GON.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260129T120000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260722T085342
CREATED:20260123T120019Z
LAST-MODIFIED:20260123T120019Z
UID:24286-1769688000-1769691600@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'GeV-scale QCD Axion'
DESCRIPTION:Title: ‘GeV-scale QCD Axion’\n\nSpeaker: Thomas Steingasser (IFT)\n\nVenue & Time: 12:00 / Gray Room 3\n\nAbstract: In order to solve the strong CP problem\, we study the possibility that the Peccei–Quinn symmetry is broken below the QCD scale. We find that a QCD axion can be above GeV\, and may be among the observed η resonances. It is immune to quantum gravity corrections. The only fermion that has a U (1) Peccei–Quinn charge is the right-handed up quark. Flavor-changing neutral currents are surprisingly small\, except for a possible but not necessary contribution to D0–D0 mixing. All accelerator and astrophysical limits can be evaded. The most significant constraint is the mass splitting between π± and π0. In a UV completed model\, LHC can look for a dijet resonance in u ̄u\,u  ̄d\, d ̄u channels.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-gev-scale-qcd-axion/
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:20260129T120000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260722T085342
CREATED:20260122T130534Z
LAST-MODIFIED:20260122T130751Z
UID:24262-1769688000-1769691600@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Mapping moduli across heterotic conifolds'
DESCRIPTION:Strings\, Pheno and the Swampland Journal Club\n\n\nTitle: ‘Mapping moduli across heterotic conifolds’\n\n\nSpeaker: Christian Aoufia (IFT)\n\n\nVenue & Time: Red Room / 12:00\n\n\nAbstract: In this work\, we provide evidence for a duality between 4-dimensional Calabi-Yau compactifications of the heterotic string\, in which the base manifolds are linked by a conifold transition. In recent work\, a geometric proposal was put forward for how 5-branes and gauge bundles are carried across such transitions. It was observed that compactifications connected in this way lead to 4-dimensional effective theories with the same massless spectrum. Here we provide much stronger evidence that these heterotic conifold transitions do indeed lead to dual theories. We construct a duality map between the field spaces of the two compactifications and use it to demonstrate the agreement of large numbers of holomorphic functions appearing in the definition of the effective theories. In an example\, we show that 147\,440 independent superpotential Yukawa couplings agree across the duality as holomorphic functions of the moduli. In certain special cases\, the putative duality studied here reduces to the target space duality of (0\,2) gauged linear sigma models.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-mapping-moduli-across-heterotic-conifolds/
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:20260129T110000
DTEND;TZID=Europe/Madrid:20260129T130000
DTSTAMP:20260722T085342
CREATED:20260126T091747Z
LAST-MODIFIED:20260126T091759Z
UID:24298-1769684400-1769691600@www.ift.uam-csic.es
SUMMARY:ML-AI-HPC Jounal Club: 'Probabilistic modeling and Bayesian inference for collider data'
DESCRIPTION:Title: ‘Probabilistic modeling and Bayesian inference for collider data’ \nSpeaker: Santiago Tanco (IFLP-CONICET/UNLP) \nVenue&Time: Gray Room 1 / 11:00 \n 
URL:https://www.ift.uam-csic.es/event/ml-ai-hpc-jounal-club-probabilistic-modeling-and-bayesian-inference-for-collider-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:20260127T140000
DTEND;TZID=Europe/Madrid:20260127T150000
DTSTAMP:20260722T085342
CREATED:20260123T133337Z
LAST-MODIFIED:20260123T133427Z
UID:24294-1769522400-1769526000@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-11/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T170000
DTEND;TZID=Europe/Madrid:20260122T180000
DTSTAMP:20260722T085342
CREATED:20260116T123614Z
LAST-MODIFIED:20260116T123646Z
UID:24199-1769101200-1769104800@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Particle Spectrum in Quantum Field Theory'
DESCRIPTION:Alejandro Puga (IFT) will present “Particle Spectrum in Quantum Field Theory”  de Alexander M. Polyakov (JETP Lett. 20 (1974) 194-195)\n\nAbstract: We investigate the nonperturbative structure of quantum field theories and its consequences for the physical spectrum of excitations. Emphasis is placed on the role of instantons—topologically nontrivial field configurations—which contribute essentially to tunneling processes and mass generation beyond perturbation theory. The analysis demonstrates how instanton effects modify correlation functions and lead to qualitatively new features in the particle spectrum\, highlighting the deep connection between topology\, symmetry\, and dynamics in quantum field theory.\n\nVenue & Time: Blue Room / 17:00
URL:https://www.ift.uam-csic.es/event/old-journal-club-particle-spectrum-in-quantum-field-theory/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T120000
DTEND;TZID=Europe/Madrid:20260122T130000
DTSTAMP:20260722T085342
CREATED:20260116T123236Z
LAST-MODIFIED:20260116T123708Z
UID:24198-1769083200-1769086800@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Thursday at 12:00 in Grey Room 3.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-5/
LOCATION:Madrid
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260122T120000
DTEND;TZID=Europe/Madrid:20260122T130000
DTSTAMP:20260722T085342
CREATED:20260116T122902Z
LAST-MODIFIED:20260116T123748Z
UID:24200-1769083200-1769086800@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'K-Points and Type IIB/Heterotic Duality with NS5-Branes'
DESCRIPTION:Speaker: Lorenzo Paoloni (IFT) \nVenue & Time: Red Room / 12:00 \nAbstract: We revisit type II_0 limits in the vector multiplet moduli space of compactifications of Type IIB string theory on Calabi-Yau threefolds. These limits are special because they cannot be described using mirror symmetry. While we showed in previous work that the gravitational duality frame emerging in such limits corresponds to a weakly coupled heterotic string compactified on K3 times a string-sized torus\, our focus here is on the additional field theory sectors that decouple from gravity in these asymptotic regimes. Concretely\, we argue that\, in the dual heterotic description\, these field theory sectors correspond to spacetime-filling NS5-branes wrapping the heterotic torus. The existence of such non-perturbative field theory sectors manifests itself in an exponential dependence of the prepotential on the heterotic dilaton at leading order. Applied to K-point limits in one-parameter moduli spaces\, our results imply that these limits are in perfect agreement with the Distance and Emergent String Conjectures. More precisely\, the light tower of states predicted by the Distance Conjecture arises from excitations of a weakly coupled heterotic string compactified to four dimensions on a background containing spacetime-filling NS5-branes.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-k-points-and-type-iib-heterotic-duality-with-ns5-branes/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260120T140000
DTEND;TZID=Europe/Madrid:20260120T150000
DTSTAMP:20260722T085342
CREATED:20260116T125647Z
LAST-MODIFIED:20260116T125647Z
UID:24212-1768917600-1768921200@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-10/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20260115T120000
DTEND;TZID=Europe/Madrid:20260115T130000
DTSTAMP:20260722T085342
CREATED:20260108T235522Z
LAST-MODIFIED:20260112T110919Z
UID:24173-1768478400-1768482000@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'Bubble velocities in local equilibrium from a pseudopotential'
DESCRIPTION:Speaker: Eric Madge\, IFT \nVenue&Time: 12:00 / Grey room 3 \nAbstract: We present a new method to estimate terminal bubble velocities during first-order phase transitions in a plasma in local equilibrium. The method relies on calculating the extrema of a modified potential function for the scalar field undergoing the transition. The shape of this function\, which we refer to as the “pseudopotential”\, changes with the wall velocity\, and if the dependence of the fluid temperature on scalar gradients is weak—which is confirmed to hold with high accuracy in concrete examples—the difference in pseudopotential between two appropriate extrema gives the net outward pressure acting on the bubble wall. It then follows that the correct terminal bubble velocities are those that lead to degenerate minima in the pseudopotential. This allows to compute bubble velocities without having to solve the equation of motion of the scalar field\, and in contrast to other methods this can be done without relying on simplified equations of state for the plasma or without choosing a specific ansatz for the scalar field profile. We illustrate the method in a singlet extension of the Standard Model\, computing the net outward pressure as a function of the wall velocity. We confirm the dip in outward pressure found in the literature for hybrid bubbles\, which implies that stationary deflagrations are stable\, while their detonation counterparts are unstable
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-bubble-velocities-in-local-equilibrium-from-a-pseudopotential/
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:20260115T120000
DTEND;TZID=Europe/Madrid:20260115T130000
DTSTAMP:20260722T085342
CREATED:20260108T233656Z
LAST-MODIFIED:20260109T064725Z
UID:24167-1768478400-1768482000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Exotic Branes and Symmetries of String Theory'
DESCRIPTION:Speaker: Andriana Makridou (IFT) \nVenue & Time: Red Room / 12:00 \nAbstract: Are duality transformations symmetries of string theory? For AdS space-time the answer is\nno for generic asymptotic values of the moduli\, since the duality symmetry is broken explicitly\nin the dual conformal field theory. In contrast\, in string theory in flat space-time\, monodromy\naround codimension two exotic branes show that duality transformations are spontaneously\nbroken discrete gauge symmetries with observable consequences\, provided macroscopic loops\nof these branes are not hidden behind an event horizon. We discuss how this can be achieved\nand how the situation in flat space-time differs from that in AdS space-time. We also discuss\nobservability of codimension two non-BPS branes and codimension one BPS and non-BPS\nbranes. Based on [2512.19068].
URL:https://www.ift.uam-csic.es/event/sps-journal-club-exotic-branes-and-symmetries-of-string-theory/
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:20251216T150000
DTEND;TZID=Europe/Madrid:20251216T160000
DTSTAMP:20260722T085342
CREATED:20251212T150514Z
LAST-MODIFIED:20251218T085316Z
UID:24132-1765897200-1765900800@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: 'How large can lepton mixing be?'
DESCRIPTION:Speaker: Sergio Rodríguez Benítez (IFT) \nVenue & Time: Grey Room 3 / 15:00 \nAbstract: We show that\, contrary to common expectations\, the observed charged leptons can have a substantial mixing with new heavier fermions\, at the level of 20%. This can happen\, in the language of effective theories\, when the effect of mixing with heavier fermions vanishes at tree level in operators of mass-dimension 6 (or it is suppressed by the small charged lepton masses)\, a cancellation that can be naturally ensured by symmetries. Using a model that realizes this scenario we consider all current direct and indirect constraints and show that experimental constraints on the mixing are so mild that\, given the current direct limit on the mass of the heavy fermions\, theoretical considerations become the leading current constraints on the mixing. We also estimate the sensitivity to the mixing at future experiments\, including the high-luminosity phase of the LHC and\, most notably\, the FCCee\, and FCC-hh. We find a pattern in which the reach of direct searches in hadron machines makes theoretical considerations lead the limits while the precision of lepton machines can beat these theoretical considerations. We find that the FCC can finally reach per milleprecision in the mixing squared of the charged leptons. \n 
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-how-large-can-lepton-mixing-be/
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:20251204T170000
DTEND;TZID=Europe/Madrid:20251204T180000
DTSTAMP:20260722T085342
CREATED:20251128T155727Z
LAST-MODIFIED:20251128T160503Z
UID:23979-1764867600-1764871200@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Field Theories with Superconductor Solutions'
DESCRIPTION:Lorenzo Paoloni (IFT) will present :“Field Theories with Superconductor Solutions”\, Nuovo Cim. 19 (1961) 154–164 de J. Goldstone. \nVenue & Time: Blue Room / 17:00 \n \nAbstract: The conditions for the existence of non-perturbative type « superconductor » solutions of field theories are examined. A non-covariant canonical transformation method is used to find such solutions for a theory of a fermion interacting with a pseudoscalar boson. A covariant renormalisable method using Feynman integrals is then given. A « superconductor » solution is found whenever in the normal perturbative-type solution the boson mass squared is negative and the coupling constants satisfy certain inequalities. The symmetry properties of such solutions are examined with the aid of a simple model of self-interacting boson fields. The solutions have lower symmetry than the Lagrangian\, and contain mass zero bosons. \nMore info: https://inspirehep.net/literature/12289
URL:https://www.ift.uam-csic.es/event/old-journal-club-field-theories-with-superconductor-solutions/
LOCATION:Blue Room\, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251204T120000
DTEND;TZID=Europe/Madrid:20251204T130000
DTSTAMP:20260722T085342
CREATED:20251128T160428Z
LAST-MODIFIED:20251128T160523Z
UID:23984-1764849600-1764853200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'On the K-point in moduli space'
DESCRIPTION:Speaker: Alessandra Grieco (IFT)\n\nVenue & Time: Red Room / 12:00\n\nAbstract: We study a class of infinite-distance loci\, referred to as K-points\, in one-parameter complex-structure moduli spaces of type IIB string theory compactified on Calabi-Yau manifolds. We show that around K-points the effective four-dimensional supergravity exhibits certain unusual properties. The two most prominent being that the leading order dependence of the prepotential on the gauge couplings is non-perturbative and that the leading gauge kinetic terms in the action vanish when evaluated on an anti self-dual graviphoton background. These properties are shared with the conifold locus in moduli space\, rather than the large complex-structure locus. The conifold locus is well-known to arise from integrating out a charged BPS state\, and so the similarities suggest that the K-point also arises from integrating out a BPS state. We develop such an interpretation\, finding that it corresponds to a BPS state which is extremely light\, whose mass in Planck units is doubly-exponentially small in the distance to the K-point. The state behaves as if it had complex charges\, or as if it couples to the self-dual and anti self-dual parts of the graviphoton differently. Assuming such an integrating-out scenario is indeed the correct physics for the K-point\, we discuss the implications for our understanding of infinite distances in moduli space and for the Swampland Distance Conjecture.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-on-the-k-point-in-moduli-space/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251203T113000
DTEND;TZID=Europe/Madrid:20251203T123000
DTSTAMP:20260722T085342
CREATED:20251128T170554Z
LAST-MODIFIED:20251218T085316Z
UID:23993-1764761400-1764765000@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: 'Programming quantum matter made with light and atoms'
DESCRIPTION:Speaker: Cristian Tabares \n\nVenue & Time: 11:30 / Gray Room 3 \n\nAbstract: Current experimental quantum devices do not yet meet the requirements for building fault-tolerant quantum computers\, but they can still be used to address many-body problems as analogue quantum simulators. Furthermore\, recent experimental advances [1-4] are enabling these simulators to operate in a programmable manner [5]\, where their dynamics can be used as resources to generate a set of (non-universal) quantum gates. These controllable systems are able to generate highly entangled states\, but a natural question is how to use these resources for quantum simulation purposes.\n\n\nIn this seminar we will discuss two different approaches. The first one will be based on state preparation\, demonstrating how a classical device can be used to assist the analogue quantum simulator in the task of many-body state preparation [6\,7] with variational algorithms. We will focus on fermionic atoms in optical lattices [8]\, constructing for ground-state preparation of local and extended Fermi-Hubbard models that show considerable improvements with respect to equivalent adiabatic methods. Then\, in the second part of the talk\, we will introduce an algorithm specifically tailored for analog quantum simulators to accurately recover their ground state properties [9]. Using only global time evolution under a target Hamiltonian\, our algorithm avoids the need for local control that is typically required in conventional quantum phase estimation.\n\n\nThese results provide programmable quantum simulators with a new set of tools that further leverage their current capabilities. Overall\, our work opens new avenues for analog simulators to make a wider and more efficient exploration of their relevant many-body Hilbert space.\n\n\n\n[1] X. Zhang et al.\, Science 379\, 278-283 (2023). \n[2] C. Kokail et al.\, Nature 569\, 355–360 (2019). \n[3] S. Ebadi et al.\, Nature 595\, 227–232 (2021). \n[4] D. Bourgund et al.\, Nature 637\, 57–62 (2025). \n[5] A. J. Daley et al.\, Nature 607\, 667–676 (2022). \n[6] C. Tabares\, A. Muñoz de las Heras\, L. Tagliacozzo\, D. Porras\, and A. González-Tudela\, Phys. Rev. Lett. 131\, 073602 (2023). \n[7] A. Muñoz de las Heras\, C. Tabares\, J. Schneider\, L. Tagliacozzo\, D. Porras\, and A. González-Tudela.\, Phys. Rev. Research 6\, 013299 (2024). \n[8] C. Tabares\, C. Kokail\, P. Zoller\, D. González-Cuadra and A. González-Tudela\, PRX Quantum 6\, 030356 (2025). \n[9] C. Tabares\, D. S. Wild\, J. I. Cirac\, P. Zoller\, A. Gonzalez-Tudela\, and D. González-Cuadra\, arXiv:2511.04434 (2025).
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-programming-quantum-matter-made-with-light-and-atoms/
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:20251202T150000
DTEND;TZID=Europe/Madrid:20251202T160000
DTSTAMP:20260722T085342
CREATED:20251128T160718Z
LAST-MODIFIED:20251128T160718Z
UID:23989-1764687600-1764691200@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club
DESCRIPTION:Every Tuesday at 15:00 in Grey Room 3.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-4/
LOCATION:Gray Room 3\, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, 28049\,\, Spain
CATEGORIES:Journal clubs
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251202T140000
DTEND;TZID=Europe/Madrid:20251202T150000
DTSTAMP:20260722T085342
CREATED:20251128T160842Z
LAST-MODIFIED:20251128T160842Z
UID:23991-1764684000-1764687600@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-9/
LOCATION:Discussion room 5th floor\, C. Nicolás Cabrera\, 13-15\, Fuencarral-El Pardo\, Madrid\, Madrid\, 28049\, Spain
CATEGORIES:Journal clubs
END:VEVENT
END:VCALENDAR