Noise correlations of the ultra-cold Fermi gas in an optical lattice
arXiv:0801.1015 · doi:10.1103/PhysRevA.77.053602
Abstract
In this paper we study the density noise correlations of the two component Fermi gas in optical lattices. Three different type of phases, the BCS-state (Bardeen, Cooper, and Schieffer), the FFLO-state (Fulde, Ferrel, Larkin, and Ovchinnikov), and BP (breach pair) state, are considered. We show how these states differ in their noise correlations. The noise correlations are calculated not only at zero temperature, but also at non-zero temperatures paying particular attention to how much the finite temperature effects might complicate the detection of different phases. Since one-dimensional systems have been shown to be very promising candidates to observe FFLO states, we apply our results also to the computation of correlation signals in a one-dimensional lattice. We find that the density noise correlations reveal important information about the structure of the underlying order parameter as well as about the quasiparticle dispersions.
25 pages, 11 figures. Some figures are updated and text has been modified
References in corpus (20)
- Spatial quantum noise interferometry in expanding ultracold atom clouds
- Observation of Phase Separation in a Strongly-Interacting Imbalanced Fermi Gas
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
- Phase diagram of a two-component Fermi gas with resonant interactions
- Molecules of Fermionic Atoms in an Optical Lattice
- Deformation of a Trapped Fermi Gas with Unequal Spin Populations
- Phase diagram of a strongly interacting polarized Fermi gas in one dimension
- Interference of an array of independent Bose-Einstein condensates
- BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
- Pairing states of a polarized Fermi gas trapped in a one-dimensional optical lattice
- Quasi-one-dimensional polarized Fermi superfluids
- Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
- Fermion pairing with spin-density imbalance in an optical lattice
- Bragg Spectroscopy of Cold Atomic Fermi Gases
- Superfluid and insulating phases of fermion mixtures in optical lattices
- Bragg scattering of Cooper pairs in an ultra-cold Fermi gas
- Detecting the breached pair phase in a polarized ultracold Fermi gas
- Magnetic and superfluid phases of confined fermions in two-dimensional optical lattices
- Ultracold polarized Fermi gas at intermediate temperatures
Cited by in corpus (6)
- FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
- Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices
- Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D optical lattices
- Probing the FFLO phase by double occupancy modulation spectroscopy
- Topological Fulde-Ferrell Superfluids of a Spin-Orbit Coupled Fermi Gas
- Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state