2008/09/30 by V. W. Scarola, Lode Pollet, L. Pollet +3 · 3 citations
Chemistry · Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Spectroscopy and Laser Applications #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physrevlett.102.135302
published as Phys. Rev. Lett. 102, 135302 (2009)
openalex publication_date 2009/03/31 · arxiv created 2009/11/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Experiments with cold atoms trapped in optical lattices offer the potential to realize a variety of novel phases but suffer from severe spatial inhomogeneity that can obscure signatures of new phases of matter and phase boundaries. We use a high temperature series expansion to show that compressibility in the core of a trapped Fermi-Hubbard system is related to measurements of changes in double occupancy. This core compressibility filters out edge effects, offering a direct probe of compressibility independent of inhomogeneity. A comparison with experiments is made.