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Proceedings Paper

Quantum refrigerator in the quest for the absolute zero temperature
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Paper Abstract

One of the formulations of the third laws of thermodynamics is that a processes become more isentropic as one approaches the absolute zero temperatures. We examine this prediction by studying an operating model of a quantum refrigerator pumping heat from a cold to a hot reservoir. The working medium consists of a gas of noninteracting harmonic oscillators. The model can be solved in closed form in the quasi-static limit or numerically for general conditions. It is found that the isentropic limit for Tc → 0 is approached only on the expansion segment of the refrigeration cycle. The scaling of the cooling rate with temperature is shown to be consistent with the second law of thermodynamics. This scaling is also consistent with the unattainability principle which is an alternative formulation of the third law of thermodynamics.

Paper Details

Date Published: 4 February 2008
PDF: 8 pages
Proc. SPIE 6907, Laser Refrigeration of Solids, 69070F (4 February 2008); doi: 10.1117/12.761008
Show Author Affiliations
Yair Rezek, The Hebrew Univ. (Israel)
Ronnie Kosloff, The Hebrew Univ. (Israel)

Published in SPIE Proceedings Vol. 6907:
Laser Refrigeration of Solids
Richard I. Epstein; Mansoor Sheik-Bahae, Editor(s)

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