Quasi-One-Dimensional Polarized Fermi Superfluids

Journal Article · Fri Dec 21 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.250403· OSTI ID:21024607

Parish, Meera M ^[1]; Baur, Stefan K; Mueller, Erich J ^[2]; Huse, David A ^[1]

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1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
2. Laboratory for Atomic and Solid State Physics, Cornell University, Ithaca New York 14853 (United States)

We calculate the zero-temperature (T=0) phase diagram of a polarized two-component Fermi gas in an array of weakly coupled parallel one-dimensional (1D) ''tubes'' produced by a two-dimensional optical lattice. Increasing the lattice strength drives a crossover from three-dimensional (3D) to 1D behavior, stabilizing the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) modulated superfluid phase. We argue that the most promising regime for observing the FFLO phase is in the quasi-1D regime, where the atomic motion is largely 1D but there is weak tunneling in the other directions that stabilizes long-range order. In the FFLO phase, we describe a phase transition where the quasiparticle spectrum changes from gapless near the 3D regime to gapped in quasi-1D.

• OSTI ID: 21024607
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
FERMI GAS
ONE-DIMENSIONAL CALCULATIONS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
SPECTRA
SUPERFLUIDITY
THREE-DIMENSIONAL CALCULATIONS
TUNNEL EFFECT
TWO-DIMENSIONAL CALCULATIONS