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SUMMARY:Renormalization Group Flows for Quantum Gravity
DTSTART;VALUE=DATE-TIME:20150116T153000Z
DTEND;VALUE=DATE-TIME:20150116T155000Z
DTSTAMP;VALUE=DATE-TIME:20190322T082237Z
UID:indico-contribution-536-2938@indico.in2p3.fr
DESCRIPTION:Speakers: Vincent RIVASSEAU ()\nWe shall review briefly some c
urrent approaches to quantum gravity\, focusing in particular on the recen
t progress on tensor-based models which sum over all discretized space-tim
e geometries and can be shown renormalizable and asymptotically free.\n\nh
ttps://indico.in2p3.fr/event/10699/contributions/2938/
LOCATION:Institut Henri Poincaré Chair: Bira Van Kolck\, Amphi Hermite
URL:https://indico.in2p3.fr/event/10699/contributions/2938/
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BEGIN:VEVENT
SUMMARY:Recent developments in formal high energy physics
DTSTART;VALUE=DATE-TIME:20150116T150500Z
DTEND;VALUE=DATE-TIME:20150116T153000Z
DTSTAMP;VALUE=DATE-TIME:20190322T082237Z
UID:indico-contribution-536-2931@indico.in2p3.fr
DESCRIPTION:Speakers: Guillaume Bossard (CPhT)\nI will review several rece
nt important developments in high energy physics\, including: \n-Perturba
tive and non-perturbative results in supersymmetric non-abelian gauge theo
ries (AdS / CFT\, Localisation\, non-Langrangian theories).\n-Superstring
and supergravity amplitudes\, 3-loop amplitude in string theory\, color ki
nematic duality and double copy\, BMS symmetry and infrared behaviour. \n-
Black hole information paradox\, Mathur conjecture and exact counting thro
ugh localisation.\n\nhttps://indico.in2p3.fr/event/10699/contributions/293
1/
LOCATION:Institut Henri Poincaré Chair: Bira Van Kolck\, Amphi Hermite
URL:https://indico.in2p3.fr/event/10699/contributions/2931/
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BEGIN:VEVENT
SUMMARY:From OPE to Soft-Wall
DTSTART;VALUE=DATE-TIME:20150116T160500Z
DTEND;VALUE=DATE-TIME:20150116T162000Z
DTSTAMP;VALUE=DATE-TIME:20190322T082237Z
UID:indico-contribution-536-2906@indico.in2p3.fr
DESCRIPTION:Speakers: David Greynat (Universita di Napoli and INFN)\nWe wi
ll show how it is possible to implement a chiral symmetry breaking mechani
sm in soft-wall model of holographic QCD. By perturbing a dilaton potentia
l\, we show also that it is possible to reproduce the exact Operator Produ
ct Expansion and the spectrum of the vector-vector and axial-axial correla
tors in the Large-N$_c$ limit.\n\nhttps://indico.in2p3.fr/event/10699/cont
ributions/2906/
LOCATION:Institut Henri Poincaré Chair: Bira Van Kolck\, Amphi Hermite
URL:https://indico.in2p3.fr/event/10699/contributions/2906/
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BEGIN:VEVENT
SUMMARY:Renormalization Group Optimized Perturbation: some illustrations a
t zero and finite temperature.
DTSTART;VALUE=DATE-TIME:20150116T155000Z
DTEND;VALUE=DATE-TIME:20150116T160500Z
DTSTAMP;VALUE=DATE-TIME:20190322T082237Z
UID:indico-contribution-536-2895@indico.in2p3.fr
DESCRIPTION:Speakers: Jean-Loic Kneur (LCC Montpellier)\nWe discuss our re
cently developed variant of the so-called optimized perturbation (OPT)\, '
RGOPT'\, consistently resumming renormalization group dependence generical
ly for zero or finite temperature theories. It is illustrated with a rathe
r precise determination of 1) the QCD basic scale and coupling from the pi
on decay constant $F_\\pi$: $\\alpha_S(m_Z)[\\overline{MS}] \\simeq 0.1174
\\pm 0.002$\; \n2) the quark condensate $$ in the chiral limit. \n3) At f
inite temperature the pressure for the illustrative $\\phi^4$ model is cal
culated to second (modified perturbation) order. \nOur method and results
differ sharply from other similar resummation approaches\, in particular t
he notoriously bad stability and scale dependence of thermal perturbative
expansions for moderately large coupling is shown to drastically improve\,
with anticipated similar properties in thermal QCD.\n\nhttps://indico.in2
p3.fr/event/10699/contributions/2895/
LOCATION:Institut Henri Poincaré Chair: Bira Van Kolck\, Amphi Hermite
URL:https://indico.in2p3.fr/event/10699/contributions/2895/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nonrenormalizablity of nonequilibrium quantum field theory in the
classical approximation
DTSTART;VALUE=DATE-TIME:20150116T162000Z
DTEND;VALUE=DATE-TIME:20150116T163500Z
DTSTAMP;VALUE=DATE-TIME:20190322T082237Z
UID:indico-contribution-536-2887@indico.in2p3.fr
DESCRIPTION:Speakers: Bin Wu (IPhT\, CEA/Saclay)\nNonequilibrium quantum f
ield theory in the classical statistical approximation (CSA) has a broad r
ange of applications to understanding thermalization of systems with a lar
ge occupation number both in cosmology and in ultra-relativistic heavy-ion
collisions. In my talk\, I would like first to give a brief introduction
to the CSA in the $g^2\\phi^4$ theory. Then\, I will present our discovery
of nonrenormalizability of such an approximation (Phys. Rev. D 90\, 06502
9 (2014)). I shall also show the Boltzmann equation in two types of classi
cal approximations\, which are equivalent to the CSA in the case that the
distribution function $f$ satisfies $\\frac{1}{g^2}\\gg f\\gg 1$. The nume
rical results to the Boltzmann equation in one of the classical limits pre
sented in another paper of ours (arXiv:1409.0701\, to appear in PRD) furth
er confirm nonrenormalizability of the CSA. Besides\, I would also like to
discuss the features of forming a Bose-Einstein condensate in the classic
al approximations.\n\nhttps://indico.in2p3.fr/event/10699/contributions/28
87/
LOCATION:Institut Henri Poincaré Chair: Bira Van Kolck\, Amphi Hermite
URL:https://indico.in2p3.fr/event/10699/contributions/2887/
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