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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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TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
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TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
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TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
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DTSTART:20251026T010000
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DTSTART:20260329T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20250926T113000
DTEND;TZID=Europe/Madrid:20250926T113000
DTSTAMP:20260405T233352
CREATED:20250922T115233Z
LAST-MODIFIED:20251218T085639Z
UID:22869-1758886200-1758886200@www.ift.uam-csic.es
SUMMARY:To bind or not to bind\, a tale of two nucleons
DESCRIPTION:Speaker: André Walker-Loud (LBNL) \nVenue&Time: Red Room / 11:30 AM \nAbstract: Our ability to understand the emergence of nuclear physics from the Standard Model requires an understanding two nucleon interactions from the underlying quark and gluon degrees of freedom. Due to the non-perturbative nature of QCD at low-energies\, the only method to provide such predictions\, with quantifiable uncertainties is lattice QCD. Yet the application of lattice QCD to the two-nucleon problem is beset by a number of significant challenges\, such that it has remained uncertain whether di-nucleon systems form bound states at pion masses heavier than nature. I will present recent work exploring this question with all varieties of methods in the literature\, including the HAL QCD potential method\, on a single set of gauge ensembles\, enabling for a direct comparison of the methods.
URL:https://www.ift.uam-csic.es/event/to-bind-or-not-to-bind-a-tale-of-two-nucleons/
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:20250926T150000
DTEND;TZID=Europe/Madrid:20250926T160000
DTSTAMP:20260405T233352
CREATED:20250922T030252Z
LAST-MODIFIED:20251218T085639Z
UID:22793-1758898800-1758902400@www.ift.uam-csic.es
SUMMARY:Delta N formalism: non-linear evolution of scalar and tensor perturbations during inflation
DESCRIPTION:Speaker: Danilo Artigas\n\n\nInstitution: Kyoto University\n\n\nLocation&Place: IFT Seminar Room/Red Room\n\n\n\n\n\nAbstract:\n\n\nLinear-perturbation theory has proven to be an extremely powerful tool to compare inflationary models with observational data. Recently\, the newcoming high-precision observations call for predictions beyond linear perturbations. Such effects are known to be relevant for example in the production of primordial black holes or scalar-induced gravitational waves. The delta N formalism proposes to capture some of these non-linearities by describing the universe as a set of homogeneous patches evolving independently. After reviewing its formulation\, I will apply it to the case of a single scalar field following a slow-roll evolution\, briefly interrupted by a phase of ultra-slow roll where the potential is nearly flat. Taking care of the correlation of the patches\, I will show how to obtain correlation functions of scalar perturbations. As a final note\, I will briefly show how this procedure can also be applied to describe primordial gravitational waves.
URL:https://www.ift.uam-csic.es/event/delta-n-formalism-non-linear-evolution-of-scalar-and-tensor-perturbations-during-inflation/
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:20250929T090000
DTEND;TZID=Europe/Madrid:20251002T183000
DTSTAMP:20260405T233352
CREATED:20250922T115745Z
LAST-MODIFIED:20251218T085639Z
UID:22872-1759136400-1759429800@www.ift.uam-csic.es
SUMMARY:LHC Working Group on Forward Physics and Diffraction
DESCRIPTION:The September 29-October 2  2025 four-day workshop in Madrid of the LHC Physics Centre at CERN (LPCC) Forward Physics Working Group provides a forum at CERN for experimental collaborations and theorists to meet and exchange latest results across all topics of forward physics at the LHC. \nThe workshop will take place at the Institute of Theoretical Physics (Campus de Cantoblanco 28049 Madrid Spain) and we will be hosted by Prof. Agustin Sabio Vera. To come to IFT\, you can take Line C-4 (Colmenar Viejo or Alcobendas/San Sebastián de los Reyes)\, that takes you to the University (Cantoblanco-Universidad Station). You can pick it up in Atocha (main station in the Centre/South of Madrid)\, Nuevos Ministerios (Paseo de la Castellana) and Chamartín (main station in the North). After Chamartín\, the second station is Cantoblanco-Universidad\, where you should exit. \nMore info.
URL:https://www.ift.uam-csic.es/event/lhc-working-group-on-forward-physics-and-diffraction/
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20250929T150000
DTEND;TZID=Europe/Madrid:20250929T160000
DTSTAMP:20260405T233352
CREATED:20250922T120108Z
LAST-MODIFIED:20251218T085639Z
UID:22876-1759158000-1759161600@www.ift.uam-csic.es
SUMMARY:Muon g-2: nuts and bolts and lattice QCD
DESCRIPTION:Speaker: Andreas Kronfeld (Fermilab) \nVenue&Time: Red Room / 3:00 PM \nAbstract: This seminar consists of two parts. First\, it is discussed how various approaches to the hadronic vacuum polarization (HVP) for the anomalous magnetic moment of the muon\, g-2\, are connected. Second\, results for the HVP from lattice QCD are presented\, focusing on the work of the Fermilab Lattice\, HPQCD\, and MILC collaborations.
URL:https://www.ift.uam-csic.es/event/muon-g-2-nuts-and-bolts-and-lattice-qcd/
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:20250929T150000
DTEND;TZID=Europe/Madrid:20250929T160000
DTSTAMP:20260405T233352
CREATED:20250929T104149Z
LAST-MODIFIED:20251218T085638Z
UID:23129-1759158000-1759161600@www.ift.uam-csic.es
SUMMARY:Seminar by Roberto Vega-Morales
DESCRIPTION:Speaker: Roberto Vega-Morales from Granada U. \n\nVenue&Time: Red Room / 3:00 PM\n\nAbstract: TBA
URL:https://www.ift.uam-csic.es/event/seminar-by-roberto-vega-morales/
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:20251002T120000
DTEND;TZID=Europe/Madrid:20251002T130000
DTSTAMP:20260405T233352
CREATED:20250928T204751Z
LAST-MODIFIED:20251125T081259Z
UID:23072-1759406400-1759410000@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Landau-Ginzburg Models and Flux Vacua'
DESCRIPTION:Speaker: Muthusamy Rajaguru (IFT Madrid)\n\n\n\n\nVenue&Time: Red Room / 12:00 PM\n\n\n\nAbstract: In this talk\, I will give an overview of recent progress that has been made in constructing non-geometric flux vacua. In particular\, I will focus on type IIB string compactifications where the internal geometry is described by the 2^6 and 1^9 Landau-Ginzburg (LG) models. These LG models have no Kähler moduli and allow us to realize GKP-type vacua explicitly in the interior of the complex structure moduli space.  I will summarize the properties of these vacua and their implications for certain Swampland conjectures.\n\nRelevant literature – 2503.16599\, 2407.16756\, 2407.16758\, 2406.03435\, 2306.15714\, 2203.15818
URL:https://www.ift.uam-csic.es/event/sps-journal-club-landau-ginzburg-models-and-flux-vacua/
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:20251002T150000
DTEND;TZID=Europe/Madrid:20251002T160000
DTSTAMP:20260405T233352
CREATED:20250613T073446Z
LAST-MODIFIED:20251218T085638Z
UID:18492-1759417200-1759420800@www.ift.uam-csic.es
SUMMARY:Fast inference for slow likelihoods with probabilistic machine-learning
DESCRIPTION:Speaker: Jesús Torrado from IEM-CSIC\n\n\n\n\nVenue&Time: Red Room / 3:00 PM\n\n\n\nAbstract: Inference for slow likelihoods can require weeks or months\, if possible at all\, with traditional Monte Carlo samplers. This would be the case\, for example\, when fitting expensive non-linear matter spectrum models\, or when characterizing individual long-duration GW events. I will introduce a fast machine-learning Bayesian inference algorithm for general non-Gaussian posteriors with a moderate number of parameters. I will present a pedagogical discussion of some general aspects of it\, such as dealing with the curse of dimensionality\, characterizing a region of interest\, or parallelising active learning. I will show that the total number of expensive likelihood evaluations can be reduced by at least two orders of magnitude compared to traditional Monte Carlo methods\, at low overhead costs and no pre-training. I will demonstrate its performance on a couple of real cosmological and GW problems.
URL:https://www.ift.uam-csic.es/event/tba-4/
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:20251003T100000
DTEND;TZID=Europe/Madrid:20251003T173000
DTSTAMP:20260405T233352
CREATED:20250922T035943Z
LAST-MODIFIED:20251218T085638Z
UID:22821-1759485600-1759512600@www.ift.uam-csic.es
SUMMARY:César Gómez (1954–2025): A rich life in theory
DESCRIPTION:Venue&Time: Blue Room / 10:20 – 17:30 \nMore info: workshops.ift.uam-csic.es/CesarGathering/ \nCésar Gómez\, whose profound contributions to gauge theory\, string theory and quantum gravity were matched by his vision and generosity\, passed away on 7 April 2025. After earning his PhD in Salamanca\, he held positions at Harvard\, the IAS and CERN before joining the CSIC in Madrid\, where he became a founding member of the Instituto de Física Teórica\, his true scientific home. \nHis career spanned key areas of theoretical physics: from the quantum vacuum in QCD and two-dimensional conformal field theory to holography\, black holes and the quantum structure of spacetime. In recent years he embarked on bold new ideas about symmetry breaking and the quantum origin of the universe\, entering one of his most creative periods when his life was cut short. \nBeyond his scientific achievements\, César was a gifted teacher\, an inspiring presence at seminars and a remarkable conversationalist. He leaves behind not only a lasting scientific legacy\, but also the memory of a colleague and friend who enriched every exchange with curiosity\, insight and humanity. \nThe meeting will be an opportunity to celebrate Cesar’s life and career through the personal recollections of some of his friends and collaborators. \nRead CERN’s obituary
URL:https://www.ift.uam-csic.es/event/cesar-gomez-1954-2025-a-rich-life-in-theory/
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
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251007T140000
DTEND;TZID=Europe/Madrid:20251007T150000
DTSTAMP:20260405T233352
CREATED:20251008T110638Z
LAST-MODIFIED:20251125T081259Z
UID:23275-1759845600-1759849200@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/
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:20251009T120000
DTEND;TZID=Europe/Madrid:20251009T130000
DTSTAMP:20260405T233352
CREATED:20251003T130507Z
LAST-MODIFIED:20251125T081258Z
UID:23246-1760011200-1760014800@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Symmetric Moduli Spaces\, the Swampland Distance Conjecture (...and the Emergent String Conjecture?)
DESCRIPTION:Speaker: Bernardo Fraiman (IFT)\n\n\nVenue&Time: Red Room / 12:00\n\n\nAbstract: For non-compact\, locally symmetric moduli spaces M\, the set of geodesics and the geometry of the boundary can be completely characterised using group theory. Under the assumption that M is “compactifiable” and some mild conditions on the spectrum of states\, we prove the SDC for all locally symmetric spaces. We show that the states necessarily transform in some representation of the local isometry group\, and that the convex hull encoding the exponential rate at which the leading tower of states becomes light coincides with the convex hull of the weights of the representation.\n\nIn this talk I will discuss briefly some aspects of the proof\, the domain of applicability of our assumptions and their limitations. If time permits\, I will also explain how the relation between towers and weights allows one to classify moduli spaces\, particle state representations and space time dimensions compatible with the Emergent String Conjecture. Based on 2508.18401 and work in progress.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-symmetric-moduli-spaces-the-swampland-distance-conjecture-and-the-emergent-string-conjecture/
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:20251009T150000
DTEND;TZID=Europe/Madrid:20251009T160000
DTSTAMP:20260405T233352
CREATED:20250817T090853Z
LAST-MODIFIED:20251218T085638Z
UID:21513-1760022000-1760025600@www.ift.uam-csic.es
SUMMARY:Large neutrino mass in cosmology and keV sterile neutrino dark matter from a dark sector
DESCRIPTION:Speaker: Thomas Schwetz from Karlsruhe Institute of Technology (KIT)\n\n\n\n\n\nVenue&Time: Red Room / 3:00 PM \n\nAbstract:\nRecent results from cosmology place sever upper bounds on the sum of neutrino masses\, starting to be in conflict with lower bounds from neutrino oscillations. If this neutrino tension persists\, it may indicate new physics in cosmology and/or neutrino physics. After a brief review of the present state\, I discuss a new physics scenario able to explain this tension. It is based on an extended seesaw model for neutrino mass\, including a number of massless neutrinos acting as dark radiation\, as well as a keV state as a dark matter candidate. The dark sector is brought into equilibrium with neutrinos between BBN and recombination. This scenario predicts a slight increase in the effective number of neutrino species Neff at recombination\, potentially detectable byfuture CMB missions.
URL:https://www.ift.uam-csic.es/event/seminar-thomas-schwetz/
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:20251014T113000
DTEND;TZID=Europe/Madrid:20251014T130000
DTSTAMP:20260405T233352
CREATED:20251008T090655Z
LAST-MODIFIED:20251125T081258Z
UID:23262-1760441400-1760446800@www.ift.uam-csic.es
SUMMARY:Holo Club: Explicit Connections Between Krylov and Nielsen Complexity
DESCRIPTION:Speaker: Le-Chen Qu (IFT) \n\nVenue&Time: Grey Room 3 / 11:30 \n\nAbstract: We establish a precise correspondence between Krylov complexity and Nielsen complexity in quantum many-body systems. By identifying the Krylov basis with the generators of elementary gates in Nielsen’s geometric framework\, the Krylov complexity of precursor operators acquires a geometric interpretation as the length of straight-line paths in Nielsen geometry. This construction provides an upper bound on Nielsen complexity\, which becomes exact in the small-precursor limit. Employing the SYK model as a test case\, we demonstrate that the straight-line trajectory satisfies the Nielsen geodesic equation and remains both locally and globally minimizing up to a critical value of $z$\, beyond which conjugate points and geodesic loops arise. Within this framework\, cost functions quadratic in the Krylov index are further shown to reproduce the conjectured proportionality between the complexity growth rate and the operator size.
URL:https://www.ift.uam-csic.es/event/holo-club-explicit-connections-between-krylov-and-nielsen-complexity/
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:20251014T140000
DTEND;TZID=Europe/Madrid:20251014T150000
DTSTAMP:20260405T233352
CREATED:20251008T110737Z
LAST-MODIFIED:20251125T081258Z
UID:23278-1760450400-1760454000@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-2/
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:20251016T110000
DTEND;TZID=Europe/Madrid:20251016T120000
DTSTAMP:20260405T233352
CREATED:20251013T085555Z
LAST-MODIFIED:20251125T081258Z
UID:23315-1760612400-1760616000@www.ift.uam-csic.es
SUMMARY:Machine Learning and AI Journal Club
DESCRIPTION:Venue&Time: Grey Room 1
URL:https://www.ift.uam-csic.es/event/machine-learning-and-ai-journal-club/
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:20251016T120000
DTEND;TZID=Europe/Madrid:20251016T130000
DTSTAMP:20260405T233352
CREATED:20251009T103032Z
LAST-MODIFIED:20251125T081258Z
UID:23288-1760616000-1760619600@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: 'Probing the Rigidity of String Theory'
DESCRIPTION:Speaker: Georgina Staudt (Max Planck Institute Munich) \n\nVenue&Time: Red Room / 12:00 \n\nAbstract: We investigate the deformability of the Veneziano amplitude. If string theory is the unique theory of quantum gravity\, the tree level amplitudes of weak coupling limits should be non-deformable. We make progress in this direction for tachyon-free superstring theories by deriving a general positivity bound and excluding some specific families of deformations.
URL:https://www.ift.uam-csic.es/event/sps-journal-club-probing-the-rigidity-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:20251016T153000
DTEND;TZID=Europe/Madrid:20251016T170000
DTSTAMP:20260405T233352
CREATED:20250817T091751Z
LAST-MODIFIED:20260120T104641Z
UID:21519-1760628600-1760634000@www.ift.uam-csic.es
SUMMARY:DIFT Colloquium: 'Gamma Ray Bursts\, Cosmic Rays and the Sociology of Science'
DESCRIPTION:Speaker: Álvaro de Rújula from IFT & CERN \n\n\n\nVenue & Time: Aula Polivalente UAM \nAbstract: \nGamma-Ray Bursts (GRBs) and Cosmic Rays (CRs) are not difficult to comprehend. Quasars and micro-quasars are seen to emit highly relativistic “Cannonballs” (CBs)\, though the underlying mechanism remains unfathomable. The observation that core-collapse supernovae also emit CBs —plus some trivial relativistic kinematics— provides a successful understanding of GRBs and CRs. The self-defined “official experts” on these fields resist the evidence\, in an explicitly inquisitorial way.\n\nThis colloquium is related to the I+D+i project whose reference is CEX2020-001007-S\, funded by MCIN/AEI/10.13039/501100011033. The topic is framed within the following research line: Origin and composition of the universe: Astroparticles and Cosmology (Astro/Cosmo).\n 
URL:https://www.ift.uam-csic.es/event/dift-colloquium/
LOCATION:AULA POLIVALENTE UAM\, Plaza Mayor Campus de Cantoblanco UAM. C. Einstein\, 7\, Fuencarral-El Pardo\, 28049 Madrid\, Madrid\, Madrid\, 28049\,\, Spain
CATEGORIES:Scientific activities,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251016T170000
DTEND;TZID=Europe/Madrid:20251016T180000
DTSTAMP:20260405T233352
CREATED:20251010T103553Z
LAST-MODIFIED:20251125T081257Z
UID:23294-1760634000-1760637600@www.ift.uam-csic.es
SUMMARY:Old Journal Club: 'Renormalization and Effective Lagrangians'
DESCRIPTION:Pau Garcia Romeu (IFT) will present Renormalization and Effective Lagrangians by Joseph Polchinski.\n\nVenue&Time: Blue Room / 17:00\n\nAbstract:\n\nThere is a strong intuitive understanding of renormalization\, due to Wilson\, in terms of the scaling of effective lagrangians. We show that this can be made the basis for a proof of perturbative renormalization. We first study renormalizability in the language of renormalization group flows for a toy renormalization group equation. We then derive an exact renormalization group equation for a four-dimensional λø 4 theory with a momentum cutoff. We organize the cutoff dependence of the effective lagrangian into relevant and irrelevant parts\, and derive a linear equation for the irrelevant part. A lengthy but straightforward argument establishes that the piece identified as irrelevant actually is so in perturbation theory. This implies renormalizability. The method extends immediately to any system in which a momentum-space cutoff can be used\, but the principle is more general and should apply for any physical cutoff. Neither Weinberg’s theorem nor arguments based on the topology of graphs are needed.\n\nMore info: https://inspirehep.net/literature/189574
URL:https://www.ift.uam-csic.es/event/old-journal-club-renormalization-and-effective-lagrangians/
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/2025/10/OJC_Pau.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251021T140000
DTEND;TZID=Europe/Madrid:20251021T150000
DTSTAMP:20260405T233352
CREATED:20251020T062859Z
LAST-MODIFIED:20251125T081104Z
UID:23385-1761055200-1761058800@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-3/
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:20251021T150000
DTEND;TZID=Europe/Madrid:20251021T160000
DTSTAMP:20260405T233352
CREATED:20251020T062512Z
LAST-MODIFIED:20251125T081104Z
UID:23383-1761058800-1761062400@www.ift.uam-csic.es
SUMMARY:Pheno Journal Club: Coherently enhanced decoherence and cloud substructure of atom interferometers
DESCRIPTION:Speaker: Pablo Blanco Mas (IFT)\n\n\n\n\n\n\n\n\nVenue & Time: Grey Room 3 / 15:00\n\nAbstract: We study how coherent scattering of a background gas off an atom (or other matter) interferometer can lead to enhanced signals from phase shifts and contrast loss. We focus on the inclusion of realistic features of atom interferometers such as finite temperature\, cloud substructure\, and time-dependent cloud radii. The inclusion of these effects\, extending beyond the previously considered point-like cloud approximation\, naturally allow us to study the smooth transition between the coherent and incoherent scattering regimes. We discuss how the formalism presented herein can be tested in the laboratory (with near-infrared photons or an eV-scale electron gun)\, and discuss an application for the detection of dark matter interacting via long-range forces.
URL:https://www.ift.uam-csic.es/event/pheno-journal-club-coherently-enhanced-decoherence-and-cloud-substructure-of-atom-interferometers/
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:20251023T120000
DTEND;TZID=Europe/Madrid:20251023T130000
DTSTAMP:20260405T233352
CREATED:20251020T062308Z
LAST-MODIFIED:20251125T081103Z
UID:23380-1761220800-1761224400@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Inflationary Particle Production and the Swampland
DESCRIPTION:Speaker: Joaquin Masias (Munich\, Max Planck Institute) \nVenue&Time: Red Room / 12:00 PM \nAbstract: TBA
URL:https://www.ift.uam-csic.es/event/sps-journal-club-inflationary-particle-production-and-the-swampland/
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:20251023T150000
DTEND;TZID=Europe/Madrid:20251023T160000
DTSTAMP:20260405T233352
CREATED:20251008T091234Z
LAST-MODIFIED:20251125T081103Z
UID:23267-1761231600-1761235200@www.ift.uam-csic.es
SUMMARY:Bubble wall dynamics from nonequilibrium quantum field theory
DESCRIPTION:Speaker: Matthias Carosi from Munich\, Tech. U.\n\n\n\n\n\n\n\n\nVenue & Time: Red Room / 15:00\n\nAbstract:\n\n\n\nFirst-order phase transitions in the early universe are a unique probe of physics beyond the Standard Model\, with potential implications for electroweak baryogenesis\, the formation of primordial black holes\, magnetogenesis and the production of dark matter. Upcoming gravitational wave detectors may capture the imprint of such transitions\, but to extract theoretical insights from these signals requires a precise understanding of the underlyingdynamics.\nIn this talk\, I show how the language of nonequilibrium quantum field theory\, combined with the two-particle-irreducible effective action\, provides anatural framework for describing the dynamics of a bubble after nucleation. After a brief introduction to the closed-time-path formalism\, I derive the dynamical equations governing the bubble and the plasma\, and identify all sources of friction for thebubble expansion. This framework unifies the pre-existing approaches within a single\, consistent description. In the ultrarelativistic regime\, I demonstrate how to compute the friction induced by the pair production of heavy scalar particles and outline the contributions of particle mixing andtransition radiation.
URL:https://www.ift.uam-csic.es/event/seminar-by-matthias-carosi/
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:20251027T150000
DTEND;TZID=Europe/Madrid:20251027T160000
DTSTAMP:20260405T233352
CREATED:20251010T113700Z
LAST-MODIFIED:20251125T083111Z
UID:23305-1761577200-1761580800@www.ift.uam-csic.es
SUMMARY:Recent results on the origin of Galactic CRs from gamma-ray astronomy
DESCRIPTION:Speaker: Guillem Martí-Davesa (INFN-Trieste)\n\n\nVenue&Time: Red Room / 15:00\n\nAbstract: Supernovae have traditionally been invoked as the dominant cosmic ray factories within our Galaxy\, capable of accelerating protons up to PeV energies. In this seminar we will discuss to what extent such a view holds today\, and if alternative source populations could instead be relevant actors. Thus\, a comprehensive review of recent findings on supernovae\, stellar clusters\, and microquasars will be presented\, with particular emphasis on observational signatures above GeV energies.
URL:https://www.ift.uam-csic.es/event/recent-results-on-the-origin-of-galactic-crs-from-gamma-ray-astronomy/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251028T140000
DTEND;TZID=Europe/Madrid:20251028T150000
DTSTAMP:20260405T233352
CREATED:20251024T110633Z
LAST-MODIFIED:20251125T081103Z
UID:23450-1761660000-1761663600@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-4/
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:20251028T150000
DTEND;TZID=Europe/Madrid:20251028T160000
DTSTAMP:20260405T233352
CREATED:20251001T135113Z
LAST-MODIFIED:20251218T085637Z
UID:23144-1761663600-1761667200@www.ift.uam-csic.es
SUMMARY:Seminar: 'Entanglement asymmetry and spontaneously broken symmetries'
DESCRIPTION:Speaker: Eduardo García-Valdecasas (SISSA\, Trieste) \nVenue&Time: Red Room / 15:00 \nAbstract: Entanglement asymmetry is a relative entropy that faithfully measures the breaking of a symmetry in a subregion. We explore some applications in theories with spontaneously broken higher form symmetries. We will start with discrete abelian symmetries and then discuss continuous symmetries. We will be able to recover the Mermin-Wagner-Coleman theorem and refine it for the case of subregions.
URL:https://www.ift.uam-csic.es/event/seminar-by-eduardo-garcia-valdecasas/
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:20251028T150000
DTEND;TZID=Europe/Madrid:20251028T160000
DTSTAMP:20260405T233352
CREATED:20251024T110503Z
LAST-MODIFIED:20251125T081103Z
UID:23448-1761663600-1761667200@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/
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:20251029T113000
DTEND;TZID=Europe/Madrid:20251029T123000
DTSTAMP:20260405T233352
CREATED:20251027T120215Z
LAST-MODIFIED:20251125T081103Z
UID:23487-1761737400-1761741000@www.ift.uam-csic.es
SUMMARY:Quantum Information Journal Club: Randomized truncation
DESCRIPTION:Speaker: Aram Harrow (MIT) \nVenue&Time: Grey Room 3 / 11:30 \nAbstract: Given a vector v\, what is the closest k-sparse vector? The answer to this question is usually that we should take the largest k entries of v. It turns out that we can do better with randomized approximations. When approximating pure bipartite entangled states with states of low Schmidt rank\, this means that mixed approximations outperform pure approximations. This fact has application to classical algorithms for matrix product states by improving the truncation step\, and to quantum algorithms for Hamiltonian simulation.\nJoint work with Angus Lowe and Freek Witteveen. \nhttps://arxiv.org/abs/2510.08518
URL:https://www.ift.uam-csic.es/event/quantum-information-journal-club-randomized-truncation-2/
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:20251030T120000
DTEND;TZID=Europe/Madrid:20251030T130000
DTSTAMP:20260405T233352
CREATED:20251024T105840Z
LAST-MODIFIED:20251125T081103Z
UID:23444-1761825600-1761829200@www.ift.uam-csic.es
SUMMARY:SPS Journal Club: Weak Gravity and Perturbative Black Holes
DESCRIPTION:Speaker: Matteo Lotito (IFT) \nVenue&Time: Red Room / 12:00 \nAbstract: \nI present a brief summary of the derivation of the Weak Gravity Conjecture within perturbative string theory\, following [2403.14449]\, and highlight possible gaps that may hinder a fully consistent proof. I then analyze the existence and properties of the black hole solutions whose extremality bounds are compared to the string spectrum in the statement of the WGC. This analysis demonstrates that the black hole solutions we employ in our setup are reliable and do not undermine the validity of our results. \n 
URL:https://www.ift.uam-csic.es/event/sps-journal-club-weak-gravity-and-perturbative-black-holes/
LOCATION:Madrid
CATEGORIES:Journal clubs,Scientific activities
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251030T170000
DTEND;TZID=Europe/Madrid:20251030T180000
DTSTAMP:20260405T233352
CREATED:20251024T105035Z
LAST-MODIFIED:20251125T080704Z
UID:23439-1761843600-1761847200@www.ift.uam-csic.es
SUMMARY:Old Journal Club: Neutrino Masses and Mixings in Gauge Models with Spontaneous Parity Violation
DESCRIPTION:Pablo Blanco (IFT) will present Neutrino Masses and Mixings in Gauge Models with Spontaneous Parity Violation de Rabindra N. Mohapatra\, Goran Senjanovic\, Jul\, 1980 Phys.Rev.D 23 (1981) 165. \nAbstract: \nUnified electroweak gauge theories based on the gauge group SU(2)L×SU(2)R×U(1)B−L\, in which the breakdown of parity invariance is spontaneous\, lead most naturally to a massive neutrino. Assuming the neutrino to be a Majorana particle\, we show that smallness of its mass can be understood as a result of the observed maximality of parity violation in low-energy weak interactions. This result is shown to be independent of the number of generations and unaffected by renormalization effects. Phenomenological consequences of this model at low energies are studied. Observation of neutrinoless double-β decay will provide a crucial test of this class of models. Implications for rare decays such as μ→eγ\, μ→eee¯\, etc. are also noted. It is pointed out that in the realm of neutral-current phenomena\, departure from the predictions of the standard model for polarized-electron-hadron scattering\, forward-backward asymmetry in e+e−→μ+μ−\, and neutrino interactions has a universal character and may be therefore used as a test of the model.
URL:https://www.ift.uam-csic.es/event/old-journal-club-neutrino-masses-and-mixings-in-gauge-models-with-spontaneous-parity-violation/
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:20251103T150000
DTEND;TZID=Europe/Madrid:20251103T160000
DTSTAMP:20260405T233352
CREATED:20251003T100615Z
LAST-MODIFIED:20251125T083135Z
UID:23232-1762182000-1762185600@www.ift.uam-csic.es
SUMMARY:Top Ten Foundational Ideas of Theoretical Physics
DESCRIPTION:Speaker: Anthony Zee from Kavli Institute for Theoretical Physics and the Departmentof Physics\, University of California\, Santa Barbara\, CA\, USA \n\nVenue&Time: Red Room / 3:00 PM \n\nAbstract: \n\nI will list and discuss the ten foundational ideas of theoretical physics. The lecture is based on a popular book with the same title published by Princeton University Press on June 17\, 2025. The book is meant to provide a sweeping overview of theoretical physics rather than a morass of details\, and thus this talk may be suitable\, not only for students of physics\, but also for those who are interested in theoretical physics but do not know much about it.
URL:https://www.ift.uam-csic.es/event/seminar-by-anthony-zee/
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
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Madrid:20251104T090000
DTEND;TZID=Europe/Madrid:20251107T190000
DTSTAMP:20260405T233352
CREATED:20251027T111335Z
LAST-MODIFIED:20251218T085140Z
UID:23477-1762246800-1762542000@www.ift.uam-csic.es
SUMMARY:10th IBS/IFT workshop: Dark World to the Swampland
DESCRIPTION:The IBS-IFT Workshop is a regular event organized jointly by IFT and IBS-CTPU\, this year reaching its tenth anniversary. \nThe aim of the workshop is share ideas\, foster collaborations\, and to discuss recent developments in theoretical physics. \nThe event is organized over two weeks. The first week\, November 4-7\, will focus on String Phenomenology  \nThe Center for Theoretical Physics of the Universe is one of the 30 centers of the Institute of Basic Science in South Korea. The IBS-CTPU carries out research on particle physics and cosmology\, which aims to understand nature at the most fundamental level and answer the big questions about the origin of the universe. \nThe Institute for Theoretical Physics IFT UAM-CSIC is a joint research center belonging to the Spanish National Research Council (CSIC) and the Universidad Autónoma de Madrid (UAM). It is the only Spanish center dedicated entirely to research in Theoretical Physics. The IFT members develop research in the frontiers of Elementary Particle Physics\, Astroparticles\, and Cosmology\, in order to understand the fundamental keys of Nature and the Universe. \nWith this workshop we want to try to advance our understanding of quantum gravity\, mainly through the swampland program\, by refining several of the conjectures that have been put forth in the program to bridge the gap between effective field theories and the UV completion as quantum gravity.
URL:https://www.ift.uam-csic.es/event/10th-ibs-ift-workshop-strings-2/
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,Workshops
END:VEVENT
END:VCALENDAR