CMSP Seminar @ICTP Stasi Room: J.P. PAZ on Wednesday 24 May at 11:00

[Condensed_Matter_Group]

ICTP Condensed Matter and Statistical Physics Seminar
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Wednesday 24 May at 11:00 a.m.

Luigi Stasi Seminar Room, first floor, ICTP Leonardo building
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Speaker: Juan Pablo PAZ (Dept. Fisica, FCEyN, UBA & IFIBA,
UBA Conicet, Buenos Aires, Argentina)

Title: Fundamental Limit for Cooling of Driven Quantum Systems

Abstract: I will study the asymptotic behavior of a class of quantum
refrigerators consisting of a parametrically driven network of oscillators
which is coupled with an arbitrary number of thermal reservoirs. I will
describe the fundamental process that enforces the validity of the third
law of thermodynamics for this type of systems. This process, which
prevents us from cooling a cold reservoir below a certain (non 
universal)temperature, consists of the non resonant creation of 
excitations pairs inthe reservoirs and it is closely related with the 
dynamical Casimir effect. I will show that the results can be applied 
to understand, in asimple way, the fundamental limits for laser cooling 
of a single
oscillator.