Phase transitions of the coherently coupled two-component Bose gas in a square optical lattice
arXiv:1705.02833 · doi:10.1103/PhysRevA.96.063623
Abstract
We investigate properties of an ultracold, two-component bosonic gas in a square optical lattice at unit filling. In addition to density-density interactions, the atoms are subject to coherent light-matter interactions that couple different internal states. We examine the influence of this coherent coupling on the system and its quantum phases by using Gutzwiller mean field theory as well as bosonic dynamical mean field theory. We find that the interplay of strong inter-species repulsion and coherent coupling affects the Mott insulator to superfluid transition and shifts the tip of the Mott lobe toward higher values of the tunneling amplitude. In the strongly interacting Mott regime, the resulting Bose-Hubbard model can be mapped onto an effective spin Hamiltonian that offers additional insights into the observed phenomena.
References in corpus (15)
- Many-Body Physics with Ultracold Gases
- Dynamical control of matter-wave tunneling in periodic potentials
- Coherent control of dressed matter waves
- Dynamical crystallization in a low-dimensional Rydberg gas
- Monte Carlo study of two-dimensional Bose-Hubbard model
- Degenerate Bose-Bose mixture in a three-dimensional optical lattice
- An experimental and theoretical guide to strongly interacting Rydberg gases
- Superfluidity of Interacting Bosonic Mixtures in Optical Lattices
- Strong-coupling expansion for the momentum distribution of the Bose Hubbard model with benchmarking against exact numerical results
- Phase-Dependent Spontaneous Spin Polarization and Bifurcation Delay in Coupled Two-Component Bose-Einstein Condensates
- Atom-molecule Rabi oscillations in a Mott insulator
- The Miscible-Immiscible Quantum Phase Transition in Coupled Two-Component Bose-Einstein Condensates in 1D Optical Lattices
- Gap solitons in Rabi lattices
- Feshbach-Stabilized Insulator of Bosons in Optical Lattices
- Quantum and Thermal Phase Transitions in a Bosonic Atom-Molecule Mixture in a Two-dimensional Optical Lattice