期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP08(2012)049
关键词
Gauge-gravity correspondence; AdS-CFT Correspondence; Holography and quark-gluon plasmas; Quantum Dissipative Systems
资金
- Government of Canada through Industry Canada
- Province of Ontario through the Ministry of Research Innovation
- NSERC
- Canadian Institute for Advanced Research
We exploit gauge/gravity duality to study 'thermal quenches' in a plasma of the strongly coupled N = 2* gauge theory. Specifically, we consider the response of an initial thermal equilibrium state of the theory under variations of the bosonic or fermionic mass, to leading order in m/T << 1. When the masses are made to vary in time, novel new counterterms must be introduced to renormalize the boundary theory. We consider transitions the conformal super-Yang-Mills theory to the mass deformed gauge theory and also the reverse transitions. By construction, these transitions are controlled by a characteristic time scale T and we show how the response of the system depends on the ratio of this time scale to the thermal time scale 1/T. The response shows interesting scaling behaviour both in the limit of fast quenches with TT << 1 and slow quenches with TT >> 1. In the limit that TT -> infinity, we observe the expected adiabatic response. For fast quenches, the relaxation to the final equilibrium is controlled by the lowest quasinormal mode of the bulk scalar dual to the quenched operator. For slow quenches, the system relaxes with a (nearly) adiabatic response that is governed entirely by the late time profile of the mass. We describe new renormalization scheme ambiguities in defining gauge invariant observables for the theory with time dependant couplings.
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