Intrinsic Heating and Cooling in Adiabatic Processes for Bosons in Optical Lattices

Abstract

We show that by raising the lattice "adiabatically" as in all current optical lattice experiments on bosons, even though the temperature may decrease initially, it will eventually rise linearly with lattice height, taking the system further away from quantum degeneracy. This increase is {\rm intrinsic} and is caused by the {\em adiabatic compression} during the raising of red detuned lattices. However, the origin of this heating, which is {\em entirely different} from that in the bulk, also shows that one can {\em reverse} the temperature rise to reach quantum degeneracy by {\em adiabatic expansion}, which can be achieved by using blue detuned lasers.

4 pages, 3 figures, misprints are corrected and an additional acknowledgement is added

References in corpus (4)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Interference pattern and visibility of a Mott insulator
• Criterion for bosonic superfluidity in an optical lattice
• Coexistence of superfluid and Mott phases of lattice bosons

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• Boson Mott insulators at finite temperatures
• Slow Mass Transport and Statistical Evolution of An Atomic Gas Across the Superfluid-Mott Insulator Transition
• Trapped Fermi Gases in Rotating Optical Lattices: Realization and Detection of the Topological Hofstadter Insulator
• Quantum Simulation of the Hubbard Model: The Attractive Route
• Phase-slip induced dissipation in an atomic Bose-Hubbard system
• Do mixtures of bosonic and fermionic atoms adiabatically heat up in optical lattices?
• Thermometry and Refrigeration in a Two-Component Mott Insulator of Ultracold Atoms
• Adiabatic Loading of Cold Bosons in Three-Dimensional Optical Lattices and Superfluid-Normal Phase Transition
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• Finite temperature coherence of the ideal Bose gas in an optical lattice
• Strongly Interacting Two-component Coupled Bose Gas in Optical Lattices
• Excitation spectrum of Mott shells in optical lattices
• Adiabatic cooling of a tunable Bose-Fermi mixture in an optical lattice
• Dynamics of heat and mass transport in a quantum insulator
• Statistical mechanics of a Feshbach coupled Bose-Fermi gas in an optical lattice
• Heating and Cooling in Adiabatic Mixing process