Coexistence of superfluid and Mott phases of lattice bosons
arXiv:cond-mat/0611126 · doi:10.1103/PhysRevA.75.063622
Abstract
Recent experiments on strongly-interacting bosons in optical lattices have revealed the co-existence of spatially-separated Mott-insulating and number-fluctuating phases. The description of this inhomogeneous situation is the topic of this Letter. We establish that the number-fluctuating phase forms a superfluid trapped between the Mott-insulating regions and derive the associated collective mode structure. We discuss the interlayer's crossover between two- and three-dimensional behavior as a function of the lattice parameters and estimate the critical temperatures for the transition of the superfluid phase to a normal phase.
References in corpus (4)
- Imaging the Mott Insulator Shells using Atomic Clock Shifts
- Quantum Monte Carlo simulations of confined bosonic atoms in optical lattices
- Formation of spatial shell structures in the superfluid to Mott insulator transition
- Atom trapping and two-dimensional Bose-Einstein condensates in field-induced adiabatic potentials