Limits of sympathetic cooling of fermions: The role of heat capacity of the coolant

Physical Review A - Atomic, Molecular, and Optical Physics

Volumn 69, Issue 4, 2004, Pages

  Carr, L D ^a,b   Castin, Y ^a  

^a ECOLE NORMALE SUPÉRIEURE   (France)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION THEORY; COOLANTS; COOLING; EVAPORATION; HARMONIC ANALYSIS; MATHEMATICAL MODELS; SPECIFIC HEAT OF LIQUIDS; THERMAL EFFECTS;

BOLTZMANN PARTICLES; BOSE GASES; FERMI GASES; SYMPATHETIC COOLING;

FERMIONS;

EID: 2942555028     PISSN: 10502947     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevA.69.043611     Document Type: Article

References (20)

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14. A gas of identical particles is, in fact, described by either Bose or Fermi statistics as the temperature approaches zero. However, for the sake of highlighting the effect of Bose statistics in contrast to classical statistics in the coolant, and in order to explain the meaning of the classical thermodynamic argument mentioned above, we shall imagine that Boltzmann statistics can be applied down to zero temperature.
15. We do not claim here that zero temperature can be achieved in a real experiment: it would require an infinite time, as the collision rate between the fermions and the coolant tends to zero for T → 0. Furthermore, the semiclassical approximation used in this paper fails when the temperature drops below the energy of the first excited state of a particle of the coolant.
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