Instituto de Física Teórica

Cosmological Constraints from Simulation-Based Forward-Modeling of DES Cluster Abundances
2025-06-26 15:00 - 16:15 (Europe/Madrid) | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Cluster cosmology is potentially one of the most powerful observational probes of structure formation. However, enabling unbiased cosmological constraints requires careful modeling of the cluster selection function. In the case of optical cluster cosmology, this requires accurate modeling of projection effects. We will introduce a new simulation-based inference framework with which we reanalyze DES Y1 cluster abundances, highlight both the promise and challenges of this new approach.

Novelties in flavour physics
2025-06-23 15:00 - 16:30 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
I will give a brief overview of the so called flavor anomalies, describing the main strategies followed to disclose physics beyond the Standard Model. I will focus on selected modes and observables that can help identifying the nature of new physics.

New Insights in Black Hole Physics from Holography
2025-06-16 09:00 - 18:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Black holes serve as natural laboratories for probing gravity under extreme conditions. New Insights in Black Hole Physics from Holography, hosted at the Instituto de Física Teórica UAM/CSIC in Madrid, will bring together leading researchers to discuss recent advances in black hole physics through the framework of holography. The workshop will cover a range of topics, including quantum aspects of black holes, near-extremal black hole dynamics, probes of singularities and interior reconstruction, holographic applications to strongly correlated systems, and modern developments in quasinormal modes and black hole perturbations. Featuring distinguished speakers and fostering new collaborations, this event aims to advance our understanding of black holes and their dual descriptions in quantum field theory, offering new insights into fundamental questions in quantum gravity.
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Complexity in Krylov basis at extreme scenarios
2025-06-12 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
In recent times quantum computational complexity has been a major interest to both QI and HEP communities. Complexity in the Krylov basis is one such candidate which has proved its worth in several setups by providing us with meaningful insights.

Strong lensing cosmology and the line of sight
2025-06-10 14:00 - 15:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Strong gravitational lensing is a powerful observational tool in astrophysics and cosmology which has been used to study the mass and light properties of galaxies and quasars the scales and distributions of dark matter subhaloes and the expansion history of the Universe.

Exclusive or inclusive? The lattice might have the answer...
2025-06-09 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The elements of the CKM matrix are fundamental parameters of the Standard Model. Substantial experimental and theory efforts are under way aimed at determining them ever more precisely and accurately.

The fluctuating spacetime of dark matter
2025-06-05 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
What if dark matter only interacts with the visible sector through gravity?

SYK wormholes out of equilibrium
2025-06-02 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
In 2 dimensions holographic duality gives the possibility of studying quantum gravity in terms of the dual SYK quantum mechanical theory. A particularly capturing model involves two coupled SYK systems.

Holographic description of the Nieh-Yan anomaly
2025-05-29 15:00 - 16:30 | Blue Room, Instituto de Física Teórica (IFT) - C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Holographic description of the Nieh-Yan anomaly.

Probing low-reheating scenarios with freeze-in dark matter
2025-05-26 15:00 - 16:30 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The feebly-interacting massive particle (FIMP) paradigm offers an intriguing solution to the dark matter (DM) puzzle with FIMPs produced via the freeze-in mechanism due to extremely weak interactions with the standard model (SM) plasma.

Understanding thermalization in a non-Abelian gauge theory
2025-05-22 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Understanding the mechanism of thermalization in gauge theories is one of the challenging problems of contemporary research.

Bootstrapping line defects in AdS3/CFT2
2025-05-20 15:00 - 16:30 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
We study correlators of insertions along 1/2 BPS line defects in the holographic dual to type IIB string theory in AdS3×S3×T4 with mixed Ramond-Ramond and Neveu Schwarz-Neveu Schwarz three-form flux.

Generalized Symmetries Branes and Holography
2025-05-19 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The notion of global symmetry in quantum field theory has been generalized in many interesting directions including p-form symmetries higher-form symmetries and non-invertible symmetries.

Bootstrapping CFTs with moduli spaces
2025-05-13 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Many SUSY CFTs have a continuous space of vacua known as a moduli space. Understanding how moduli spaces manifest in CFT data is crucial for classifying and constraining SUSY CFTs yet remains an open problem.

Unraveling the DAMA/LIBRA Puzzle: last results from the ANAIS-112 Experiment
2025-05-12 12:00 - 13:30 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
For over two decades the DAMA/LIBRA experiment has reported an annual modulation in the low-energy region consistent with the expectation from dark matter (DM) in the galactic halo due to Earth’s motion around the Sun.

Bubble wall velocity from hydrodynamics
2025-05-08 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Terminal velocity reached by bubble walls in cosmological first-order phase transitions is an important parameter determining both primordial gravitational wave spectrum and the production of baryon asymmetry in models of electroweak baryogenesis.

Extra dimensions of space: science or fiction?
2025-05-05 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
In this (hopefully) pedagogical talk I explain why it is useful to contemplate extra dimensions of space and how it can change the way we think about the cosmological constant problem.

Continuous spin particles on-shell
2025-04-28 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Continuous spin particles (CSPs) arise naturally in the classification of unitarity representations of the Poincaré group but have long been dismissed because of their unintuitive nature.

Hadronic resonances from Lattice QCD
2025-04-24 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The majority of known hadrons in the low-energy QCD spectrum are resonances observed in multi-particle scattering processes.

Gravitational Particle Production and Leptogenesis
2025-04-10 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
In a curved spacetime the definition of particles depends on the observer’s frame of reference.

Multiparticle correlators coherent operators and the emergence of spacetime
2025-04-07 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Understanding the emergence of spacetime from quantum mechanics is a theoretical question of fundamental importance. Implicit in the AdS/CFT correspondence and more generally in the holographic principle.

Di-Higgs Production at the LHC
2025-04-03 15:00 - 16:30 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The next major goal of the Large Hadron Collider (LHC) program is to explore the shape of the Higgs potential by measuring the trilinear Higgs self-coupling.

Dark photon portal to dark matter long-lived particles and gravitational waves
2025-03-31 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Dark photons arising at or below the GeV scale from a spontaneously broken gauge symmetry are one of the simplest and most exciting extensions of the Standard Model.

Fractional-charge hadrons and leptons to tell the Standard Model group apart
2025-03-27 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Generalised symmetries have expanded our insight into theory but their impact has not fully translated into phenomenology yet.

GRASS Seminar | Chronicles of Regular Black Holes: The Higher-Curvature Saga
2025-03-25 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
In this talk I will show how an infinite tower of higher-curvature corrections to Einstein gravity gives rise to the formation of regular black holes in space-time dimensions larger than four.

Atom interferometers as particle detectors
2025-03-24 15:00 - 16:15 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Despite the remarkable success of the Standard Model in describing nature experimental evidence suggests the existence of new physics beyond its framework.

Dynamics of metastable particle and neutrinos in the primordial era
2025-03-20 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Cosmological observations like BBN and CMB offer crucial insights into the Early Universe enabling us to trace its evolution back to lifetimes as short as 0.01 seconds and testing different extensions of the Standard model if they decay at such times.

Computations that matter
2025-03-17 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
Everything in our universe is made of matter and not antimatter and we do not understand why. An exciting possibility is that this asymmetry between baryons and antibaryons was created during the electroweak phase transition.

GRASS Seminar: Supersymmetric black holes and the gravitational path integral
2025-03-11 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
The semi-classical contribution of black holes to the grand-canonical partition function of gravity is obtained by evaluating their Euclidean on-shell action.

Stability of nonsingular black holes
2025-03-10 15:00 - 16:00 | IFT Seminar Room/Red Room, Instituto de Física Teórica (IFT) -C. Nicolás Cabrera, 13-15, Fuencarral-El Pardo, Madrid, 28049,, Spain
We show that nonsingular black holes (BHs) realized in nonlinear electrodynamics are always prone to Laplacian instability around the center because of a negative squared sound speed in the angular direction.
