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From strong passivity to extended second law of thermodynamics

Wednesday November 8, 2017
4:00 pm

 Presenter:  Raam Uzdin, Hebrew University of Jerusalem
 Series:  CQuIC Seminars
 Abstract:  To thermodynamically address quantum nanoscopic scenarios that involve very small
thermal baths and strong system-bath correlation, we suggest a new framework that
is based on the principle of passivity. Passivity allows to get many thermodynamic
inequalities that constrain observables that were so far outside the scope of
thermodynamics. As an example, we derive lower and upper bounds on the system-bath
energy covariance in Jaynes-Cummings model. Using a stronger version of the passivity
principle, we extend the second law to handle initial system-bath correlation (which
is common in microscopic strong system-bath coupling scenarios). In addition, it is
shown that passivity-based inequalities can detect "sub-Maxwellian demons" that apply
subtle feedback on the system without violating the standard second law. Finally, an
intrinsically quantum feature of strong passivity is exploited to assign a thermodynamic
cost for coherence generation.
 Host:  Akimasa Miyake
 Location:  Room 190, Physics & Astronomy

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