Discerning Incompressible and Compressible Phases of Cold Atoms in Optical Lattices

Abstract

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.

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Cited by in corpus (11)

• An SU(N) Mott insulator of an atomic Fermi gas realized by large-spin Pomeranchuk cooling
• Thermodynamics of the 3D Hubbard model on approach to the Neel transition
• Probing nearest-neighbor correlations of ultracold fermions in an optical lattice
• Compressibility of a fermionic Mott insulator of ultracold atoms
• Dynamically Generated Double Occupancy as a Probe of Cold Atom Systems
• Thermodynamics of the three-dimensional Hubbard model: Implications for cooling cold atomic gases in optical lattices
• Probing quasi-particle states in strongly interacting atomic gases by momentum-resolved Raman photoemission spectroscopy
• Solving lattice density functionals close to the Mott regime
• Physical Neural Networks with Self-Learning Capabilities
• Size and shape of Mott regions for fermionic atoms in a two-dimensional optical lattice
• Strong Boundary and Trap Potential Effects on Emergent Physics in Ultra-Cold Fermionic Gases