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SUMMARY:Xiangyu Cao (UC Berkeley)
DTSTART:20200527T153000Z
DTEND:20200527T163000Z
DTSTAMP:20260422T212607Z
UID:StatPhysForum/1
DESCRIPTION:Title: Statistical physics of operator growth\nby Xiangyu Cao (UC Berke
ley) as part of ENS Statistical Physics Forum\n\n\nAbstract\n"What is quan
tum chaos?" is a recurrent question\, which never fails to bear new ideas:
random matrices\, eigenstate thermalization hypothesis (ETH)\, scrambling
\, operator growth\, etc. I will present a layman’s overview of these co
ncepts\, in particular their merit as attempted definition of “quantum c
haos”. If time permits\, I will discuss an approach much inspired by sta
tistical physics (based on Phys. Rev. X 9\, 041017 and recent unposted wor
k).\n
LOCATION:https://researchseminars.org/talk/StatPhysForum/1/
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SUMMARY:Vincent Vargas (Université Paris 13)
DTSTART:20200610T123000Z
DTEND:20200610T133000Z
DTSTAMP:20260422T212607Z
UID:StatPhysForum/2
DESCRIPTION:Title: A probabilistic approach of ultraviolet renormalisation in the bound
ary Sine-Gordon model\nby Vincent Vargas (Université Paris 13) as par
t of ENS Statistical Physics Forum\n\n\nAbstract\nThe Sine-Gordon model is
a celebrated model of 2d quantum field theory based on the quantization o
f a cosine interaction term. Though the model has been studied by numerous
authors\, it is fair to say that a complete mathematical picture is still
lacking. In this talk\, I will present a novel probabilistic approach to
renormalization of the boundary Sine-Gordon model in a finite volume. This
new approach\, which is based on modern stochastic calculus and a new gen
eral formula for the cumulants of a random variable (which is of independe
nt interest)\, enables to define the correlations of the model in a robust
way. Based on a work with H. Lacoin\, R. Rhodes.\n
LOCATION:https://researchseminars.org/talk/StatPhysForum/2/
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