2008/01/31 by T. Paananen, Tomi Paananen, T. K. Koponen +5 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Fermi Gamma-ray Space Telescope #Fermi gas #Ground state #Lattice (music) #Noise (video) #Optical lattice #Physics #Quantum mechanics #Quasiparticle #Spectroscopy and Laser Applications #Statistical physics #Superconductivity #Superfluidity #Thermal fluctuations #Ultracold atom #cond-mat.other
paper · pdf · doi:10.1103/physreva.77.053602
published as Phys. Rev. A 77, 053602 (2008) · 25 pages, 11 figures. Some figures are updated and text has been modified
arxiv created 2008/04/23 · openalex publication_date 2008/05/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we study the density noise correlations of the two component Fermi gas in optical lattices. Three different types of phases, the BCS state (Bardeen, Cooper, and Schieffer), the FFLO state (Fulde, Ferrel, Larkin, and Ovchinnikov), and the 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 nonzero 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.