Pomeranchuk effect and spin-gradient cooling of Bose-Bose mixtures in an optical lattice

Abstract

We theoretically investigate finite-temperature thermodynamics and demagnetization cooling of two-component Bose-Bose mixtures in a cubic optical lattice, by using bosonic dynamical mean field theory (BDMFT). We calculate the finite-temperature phase diagram, and remarkably find that the system can be heated from the superfluid into the Mott insulator at low temperature, analogous to the Pomeranchuk effect in 3He. This provides a promising many-body cooling technique. We examine the entropy distribution in the trapped system and discuss its dependence on temperature and an applied magnetic field gradient. Our numerical simulations quantitatively validate the spin-gradient demagnetization cooling scheme proposed in recent experiments.

9 pages, 8 figures

References in corpus (14)

• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• The Equation of State of a Low-Temperature Fermi Gas with Tunable Interactions
• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• Cooling in strongly correlated optical lattices: prospects and challenges
• Measurement of the Entropy and Critical Temperature of a Strongly Interacting Fermi Gas
• The potential energy of a ${}^{40}$K Fermi gas in the BCS-BEC crossover
• Superfluidity of Interacting Bosonic Mixtures in Optical Lattices
• Spin gradient demagnetization cooling of ultracold atoms
• Correlated bosons on a lattice: Dynamical mean-field theory for Bose-Einstein condensed and normal phases
• Intrinsic Heating and Cooling in Adiabatic Processes for Bosons in Optical Lattices
• Thermodynamics of a Trapped Unitary Fermi Gas
• Ground state cooling of atoms in optical lattices
• Thermometry and Refrigeration in a Two-Component Mott Insulator of Ultracold Atoms

Cited by in corpus (16)

• Nonequilibrium Phase Transition of Interacting Bosons in an Intra-Cavity Optical Lattice
• Lattice supersolid phase of strongly correlated bosons in an optical cavity
• Equilibration and prethermalization in the Bose-Hubbard and Fermi-Hubbard models
• Pomeranchuk cooling of the SU($2N$) ultra-cold fermions in optical lattices
• Cooling through quantum criticality and many-body effects in condensed matter and cold gases
• Supersolidity of lattice Bosons immersed in strongly correlated Rydberg dressed atoms
• Effect of particle statistics in strongly correlated two-dimensional Hubbard models
• Mean-field scaling of the superfluid to Mott insulator transition in a 2D optical superlattice
• Competition of spin and charge excitations in the Hubbard model
• Bose-Hubbard Models in Confining Potentials: An Inhomogeneous Mean-Field Theory
• Magnetic phase transitions of spin-1 ultracold bosons in a cubic optical lattice
• Rotation-symmetry-enforced coupling of spin and angular momentum for p-orbital bosons
• Anisotropic pair-superfluidity of trapped two-component Bose gases
• The large coordination number expansion of a lattice Bose gas at finite temperature
• Spin-Induced Orbital Frustration in a Hexagonal Optical Lattice
• Quantum Fluctuation Driven First-order Phase Transitions in Optical Lattices