Isentropes of spin-1 bosons in an optical lattice

2009/10/31 by Khan W. Mahmud, K. W. Mahmud, G. G. Batrouni +2
Physics and Astronomy · #Adiabatic process #Antiferromagnetism #Boson #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Ferromagnetism #Isentropic process #Mott insulator #Optical lattice #Phase (matter) #Phase boundary #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #Superfluidity #Thermodynamics #cond-mat.quant-gas #cond-mat.stat-mech

paper · pdf · doi:10.1103/physreva.81.033609

published as Phys. Rev. A 81, 033609 (2010) · 8 pages, 8 figures, Revised version

openalex publication_date 2010/03/17 · arxiv created 2010/05/01 · arxiv updated 2013/05/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We analyze the effects of adiabatic ramping of optical lattices on the temperature of spin-1 bosons in a homogeneous lattice. Using mean-field theory, we present the isentropes in the temperature-interaction strength (T,U₀) plane for ferromagnetic, antiferromagnetic, and zero spin couplings. Following the isentropic lines, temperature changes can be determined during adiabatic loading of current experiments. We show that the heating-cooling separatrix lies on the superfluid-Mott phase boundary with cooling occurring within the superfluid and heating in the Mott insulator and quantify the effects of spin coupling on the heating rate. We find that the mean-field isentropes for low initial entropy terminate at the superfluid--Mott-insulator phase boundary.

Citations

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