Two-Component Fermi Gas on Internal-State-Dependent Optical Lattices

Journal Article · Fri Nov 25 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.226402· OSTI ID:20699615

Cazalilla, M A ^[1]; Ho, A F ^[2]; Giamarchi, T ^[3]

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1. Donostia Int'l Physics Center (DIPC), Manuel de Lardizabal, 4. 20018-Donostia (Spain)
2. School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)
3. University of Geneva, 24 Quai Enerst-Ansermet, CH-1211 Geneva 4 (Switzerland)

We study the phase diagram of a one-dimensional, two-component (i.e., pseudo-'spin'-(1/2)) ultracold atomic Fermi gas. The two atom species can have different hopping or mass. A very rich phase diagram for equal densities of the species is found, containing Mott insulators and superfluids. We also discuss coupling such 1D systems and the experimental signatures of the phases. In particular, we compute the spin-structure factor at small momentum, which should reveal a spin gap.

• OSTI ID: 20699615
• Journal Information: Physical Review Letters, Vol. 95, Issue 22; Other Information: DOI: 10.1103/PhysRevLett.95.226402; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
DENSITY
FERMI GAS
MASS
ONE-DIMENSIONAL CALCULATIONS
PHASE DIAGRAMS
SPIN
STRUCTURE FACTORS
SUPERFLUIDITY