Quantum phases of a Feshbach-resonant atomic Bose gas in one dimension

Details Quantum phases of a Feshbach-resonant atomic Bose gas in one dimension Quantum phases of a Feshbach-resonant atomic Bose gas in one dimension

2005-06-09

arxiv.org/abs/cond-mat/0506216v2

Physics

Condensed Matter

Superconductivity

4+epsilon pages, 3 figures; references added

Scientific paper

10.1103/PhysRevA.73.043606

We study an atomic Bose gas with an s-wave Feshbach resonance in a one-dimensional optical lattice, with the densities of atoms and molecules incommensurate with the lattice. At zero temperature, most of the parameter region is occupied by a phase in which the superfluid fluctuations of atoms and molecules are the predominant ones, due to the phase fluctuations of atoms and molecules being locked by a Josephson coupling between them. When the density difference between atoms and molecules is commensurate with the lattice, two additional phases may exist: the two component Luttinger liquid where both the atomic and molecular sectors are gapless, and the inter-channel charge density wave where the relative density fluctuations between atoms and molecules are frozen at low energy.

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