[Todos] Coloquios del Departamento de Física (jueves 22/3)

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Retomamos los Coloquios del Departamento, con el siguiente:

COLOQUIOS DEL DEPARTAMENTO DE FÍSICA FCEYN - UBA

http://coloquios.df.uba.ar/

   Charlas, café y galletitas

   En el Aula Federman, 1er piso, Pabellón I, Ciudad Universitaria

   Jueves 22/3, 14hs:

   The Quantum Absorption Refrigerator

Ronnie Kosloff

Hebrew University of Jerusalem, Israel

   A quantum absorption refrigerator driven by noise is studied with the
purpose of determining the limitations of cooling to absolute zero. The
model consists of a working medium coupled simultaneously to hot, cold and
noise baths. Explicit expressions for the cooling power are obtained for
Gaussian and Poisson white noise. The quantum model is consistent with the
first and second laws of thermodynamics. The third law is quantified, the
cooling power J_c vanishes as J_c proportional to T_c^{alpha}, when T_c
approach 0, where alpha =d+1 for dissipation by emission and absorption of
quanta described by a linear coupling to a thermal bosonic field, where d
is the dimension of the bath.
    
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