[Todos] Coloquios del Departamento de Física (hoy jueves 22/3, 14hs)

[pdmitruk en df.uba.ar]

Recordamos el coloquio de hoy:

  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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