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Manipulating the critical temperature for the superfluid phase transition in trapped atomic Fermi gases
 

Summary: Manipulating the critical temperature for the superfluid phase transition
in trapped atomic Fermi gases
C. P. Search, H. Pu, W. Zhang, B. P. Anderson, and P. Meystre
Optical Sciences Center, The University of Arizona, Tucson, Arizona 85721
Received 28 November 2001; published 14 June 2002
We examine the effect of the trapping potential on the critical temperature TC for the BCS transition to a
superfluid state in trapped atomic gases of fermions. TC for an arbitrary power-law trap is calculated in the
Thomas-Fermi approximation. For anharmonic traps, TC can be increased by several orders of magnitude in
comparison to a harmonic trap. Our theoretical results indicate that, in practice, one could manipulate the
critical temperature for the BCS phase transition by shaping the traps confining the atomic Fermi gases.
DOI: 10.1103/PhysRevA.65.063616 PACS number s : 03.75.Fi, 05.30.Fk, 32.80.Pj
Since the observation of Bose-Einstein condensation in
trapped atomic gases 1 , there has been increasing interest in
the possibility of observing the Bardeen-Cooper-Schrieffer
BCS phase transition to the superfluid state 2 in dilute
fermionic alkali-metal gases 311 . Currently, experimental
efforts in cooling fermionic atoms of 6
Li 12,13 and 40
K
14,15 to the quantum degenerate regime have made signifi-

  

Source: Anderson, Brian P. - Optical Sciences Center, University of Arizona

 

Collections: Physics