Thermally induced coherence in a Mott insulator of bosonic atoms
arXiv:1011.4537 · doi:10.1103/PhysRevA.83.021601
Abstract
Conventional wisdom is that increasing temperature causes quantum coherence to decrease. Using finite temperature perturbation theory and exact calculations for the strongly correlated bosonic Mott insulating state we show a practical counter-example that can be explored in optical lattice experiments: the short-range coherence of the Mott insulating phase can increase substantially with increasing temperature. We demonstrate that this phenomenon originates from thermally produced defects that can tunnel with ease. Since the near zero temperature coherence properties have been measured with high precision we expect these results to be verifiable in current experiments.
5 pages, 3 figures
References in corpus (18)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- A quantum gas microscope - detecting single atoms in a Hubbard regime optical lattice
- Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
- Interference pattern and visibility of a Mott insulator
- Spin gradient thermometry for ultracold atoms in optical lattices
- Boson Mott insulators at finite temperatures
- Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
- Strong-coupling expansion for the momentum distribution of the Bose Hubbard model with benchmarking against exact numerical results
- Intrinsic Heating and Cooling in Adiabatic Processes for Bosons in Optical Lattices
- Criterion for bosonic superfluidity in an optical lattice
- Critical entropies for magnetic ordering in bosonic mixtures on a lattice
- Finite-temperature properties of hard-core bosons confined on one-dimensional optical lattices
- Phases of a 2D Bose Gas in an Optical Lattice
- Mean-field phase diagram of cold lattice bosons in disordered potentials
- The Mott insulator phase of the one dimensional Bose-Hubbard model: a high order perturbative study
- Theory of correlations between ultra-cold bosons released from an optical lattice
- Finite temperature theory of superfluid bosons in optical lattices
- Thermometry and Refrigeration in a Two-Component Mott Insulator of Ultracold Atoms