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Title: Evaporative cooling of a two-component degenerate Fermi gas

Abstract

We derive a quantum theory of evaporative cooling for a degenerate Fermi gas with two constituents and show that the optimum cooling trajectory is influenced significantly by the quantum statistics of the particles. The cooling efficiency is reduced at low temperatures due to Pauli blocking of available final states in each binary collision event. We compare the theoretical optimum trajectory with experimental data on cooling a quantum degenerate cloud of potassium-40, and show that temperatures as low as 0.3 times the Fermi temperature can now be achieved. (c) 2000 The American Physical Society.

Authors:
 [1];  [1];  [1]
  1. JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440 (United States)
Publication Date:
OSTI Identifier:
20216407
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 61; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; QUANTUM MECHANICS; COOLING; EVAPORATION; FERMI GAS; POTASSIUM 40; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Holland, M. J., DeMarco, B., and Jin, D. S. Evaporative cooling of a two-component degenerate Fermi gas. United States: N. p., 2000. Web. doi:10.1103/PhysRevA.61.053610.
Holland, M. J., DeMarco, B., & Jin, D. S. Evaporative cooling of a two-component degenerate Fermi gas. United States. doi:10.1103/PhysRevA.61.053610.
Holland, M. J., DeMarco, B., and Jin, D. S. Mon . "Evaporative cooling of a two-component degenerate Fermi gas". United States. doi:10.1103/PhysRevA.61.053610.
@article{osti_20216407,
title = {Evaporative cooling of a two-component degenerate Fermi gas},
author = {Holland, M. J. and DeMarco, B. and Jin, D. S.},
abstractNote = {We derive a quantum theory of evaporative cooling for a degenerate Fermi gas with two constituents and show that the optimum cooling trajectory is influenced significantly by the quantum statistics of the particles. The cooling efficiency is reduced at low temperatures due to Pauli blocking of available final states in each binary collision event. We compare the theoretical optimum trajectory with experimental data on cooling a quantum degenerate cloud of potassium-40, and show that temperatures as low as 0.3 times the Fermi temperature can now be achieved. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevA.61.053610},
journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 61,
place = {United States},
year = {2000},
month = {5}
}