IISER Pune
INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH (IISER) PUNE
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An Autonomous Institution, Ministry of Human Resource Development, Govt. of India
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Seminars and Colloquia

Physics

Non-linear Fluctuation Dissipation Relation via holography 
 
Wed, Aug 07, 2019,   04:00 PM at Seminar Hall 32, 2nd floor, Main Building

Chandan Jana
ICTS, Bangalore

Abstract:

In this talk I will discuss Langevin effective theory of a heavy quark moving through a strongly coupled CFT plasma. In AdS/CFT, this system can be identified with that of a string stretched between the boundary and the horizon of an asymptotically AdS black-hole solution. I will show that the Feynam-Vernon influence functional for a heavy quark can be obtained by evaluating the Nambu-Goto action on a doubled string configuration. The expression for the influence phase passes non-trivial consistency conditions arising from the underlying unitarity and thermality of the bath. The local effective theory obeys the recently proposed non-linear FDR relating the non-Gaussianity of thermal noise to the thermal jitter in the damping constant. 

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