Pomeranchuk Cooling ofSU(2N)Ultracold Fermions in Optical Lattices

2012/02/29 by Zi Cai, Hsiang-Hsuan Hung, Hsiang-hsuan Hung +3 · 45 citations
Physics and Astronomy · #Antiferromagnetism #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Spin (aerodynamics) #Superexchange #Thermodynamics #cond-mat.quant-gas

paper · pdf · doi:10.1103/physrevlett.110.220401

published in Physical Review Letters 110(22), 220401 (American Physical Society) · 7 pages

openalex publication_date 2013/05/29 · arxiv created 2013/06/04 · arxiv updated 2013/06/06 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the thermodynamic properties of a half-filled SU(2N) Hubbard model in the two-dimensional square lattice by the method of the determinant quantum Monte Carlo simulation, which is free of the fermion "sign problem." The large number of hyperfine-spin components enhances spin fluctuations, which facilitates the Pomeranchuk cooling to temperatures comparable to the superexchange energy scale in the case of SU(6). Various physical quantities including entropy, charge fluctuations, and spin correlations are calculated.

Citations

• Fermions in 3D Optical Lattices: Cooling Protocol to Obtain Antiferromagnetism
• Large-Nexpansion for frustrated quantum antiferromagnets
• SU(N)magnetism in chains of ultracold alkaline-earth-metal atoms: Mott transitions and quantum correlations
• Exact spontaneous plaquette ground states for high-spin ladder models
• Hidden symmetry and quantum phases in spin-3/2 cold atomic systems
• Competing Orders in One-Dimensional Spin-3/2Fermionic Systems

Cited by

• Phases of one-dimensional SU(N) cold atomic Fermi gases—From molecular Luttinger liquids to topological phases