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Fundamental limit for cooling of driven quantum systems

Wednesday July 5, 2017
3:00 pm

 Presenter:  Juan Pablo Paz, University of Buenos Aires
 Series:  CQuIC Seminars
 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 in the
reservoirs and it is closely related with the dynamical
Casimir effect. I will show that the results can be applied
to understand, in a simple way, the fundamental limits
for laser cooling of a single oscillator.
 Host:  Carlton Caves
 Location:  Room 190, Physics & Astronomy

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