20230524 09:58 

Spectra, reconstructions and poleskipping
/ Grozdanov, Sašo (speaker) (University of Edinburgh)
The poles of twopoint functions in momentum space, which can be computed and analysed using holographic methods, reveal various details of the physical properties of spectra in QFTs. In thermal QFTs, the lowestenergy (IR) gapless mode is usually described by the theory of hydrodynamics. [...]
2023  1:13:44.
TH String Theory Seminar
External link: Event details
In : Spectra, reconstructions and poleskipping

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20230522 09:59 

Space charge in liquid ionisation detectors
/ Palestini, Sandro (speaker) (CERN)
The subject of space charge in HEP particle detectors became relevant first with large gaseous TPCs, while new interest came with liquid ionisation detectors, namely liquid krypton or liquid argon calorimeters operated at high intensity, and large liquid argon TPCs for neutrino experiments. In liquid media, positive ions are produced over the full detector volume, and the approach of grids as ion gates used in gasmultiplication detectors is not suitable. [...]
2023  1:05:32.
Detector Seminar
External link: Event details
In : Space charge in liquid ionisation detectors

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20230522 09:43 

Quantum field simulator for dynamics in curved spacetime
/ Floerchinger, Stefan (speaker) (University of Jena)
Quantum fields in curved spacetimes have many tantalizing theoretical properties, for example particles are being produced by the timedependence of the geometry. I will describe how quantum fields in geometries with spacetime curvature and different cosmologies can be quantumsimulated with BoseEinstein condensates in specifically designed trapping potentials and with timedependent interaction strengths. [...]
2023  1:03:54.
Theory Colloquia
External link: Event details
In : Quantum field simulator for dynamics in curved spacetime

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20230519 14:12 

Model/dataset compression for optimizing the efficiency of deep networks
/ Osadchy, Margarita (speaker) (University of Haifa (IL))
Despite the unprecedented success of deep networks in recent years, the massive size of these models and the enormous data required for training them increase the burden on storage, transmission and model training as the latter requires enormous computational costs. Even a trained model requires high performance hardware to perform inference. [...]
2023  1:01:40.
EPIT Data Science Seminars
External link: Event details
In : Model/dataset compression for optimizing the efficiency of deep networks

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20230517 14:32 

The statistics of spins for CFTs
/ Benjamin, Nathan (speaker) (Caltech)
I will discuss universal behavior of CFT data at high energies. In particular I will discuss universal formulas for both the entropy and the threepointfunctions of local operators for ddimensional CFT (d>2) as a function of energy and spin, using a technique called thermal effective field theory. [...]
2023  1:09:35.
TH String Theory Seminar
External link: Event details
In : The statistics of spins for CFTs

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20230517 11:09 
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20230511 09:16 

The Vcb puzzle  Flavour TH Institute
/ Gambino, Paolo (speaker)
The longlasting discrepancy between the inclusive and exclusive determinations of the CKM element Vcb is an unlikely signal of New Physics, but it hampers significantly the precision program in flavour physics. I will review our understanding of inclusive and exclusive semileptonic b to charm decays and discuss recent theoretical and experimental progress, as well as future prospects..
2023  1:13:09.
Theory Colloquia
External link: Event details
In : The Vcb puzzle  Flavour TH Institute

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20230510 10:46 

Bethe ansatz in 2d conformal field theory
/ Procházka, Tomáš (speaker) (Institute of Physics, Prague)
The usual approach to study 2d CFT relies on the Virasoro algebra and its representation theory. Moving away from the criticality, this infinite dimensional symmetry is lost so it is useful to have a look at 2d CFTs from more general framework of quantum integrability. Every 2d conformal field theory has a natural infinite dimensional family of commuting higher spin Hamiltonians that can be constructed out of Virasoro generators. [...]
2023  1:07:19.
TH String Theory Seminar
External link: Event details
In : Bethe ansatz in 2d conformal field theory

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20230509 16:11 

STAR Beam Energy Scan
/ Leung, YueHang (speaker) (University of Heidelberg (DE))
One of the main physics goals of the Beam Energy Scan (BES) program at the Relativistic Heavy Ion Collider (RHIC) is to study the phase diagram of QCD matter. The STAR experiment at Brookhaven National Laboratory has recently completed the second phase of the beam energy scan (BESII) program. [...]
2023  1:15:39.
EP Seminar
External link: Event details
In : STAR Beam Energy Scan

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20230509 15:50 

Reflections on Parity Breaking
/ McNamara, Jacob (speaker) (Caltech)
One approach to the Strong CP Problem (known as NelsonBarr models) is to assume that parity is a gauge symmetry, which is spontaneously broken in the world around us. In this talk, I will argue that the domain walls formed from spontaneous parity breaking are exactly stable. [...]
2023  1:06:55.
TH String Theory Seminar
External link: Event details
In : Reflections on Parity Breaking

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