Condensates induced by interband coupling in a double-well lattice

Abstract

We predict novel inter-band physics for bosons in a double-well lattice. An intrinsic coupling between the s and px band due to interaction gives rise to larger Mott regions on the phase diagram at even fillings than the ones at odd fillings. On the other hand, the ground state can form various types of condensates, including a mixture of single-particle condensates of both bands, a mixture of a single-particle condensate of one band and a pair-condensate of the other band, and a pair-condensate composed of one particle from one band and one hole from the other band. The predicted phenomena should be observable in current experiments on double-well optical lattices.

Published version

References in corpus (10)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• A lattice of double wells for manipulating pairs of cold atoms
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• Multi-Component Quantum Gases in Spin-Dependent Hexagonal Lattices
• Condensate fraction in a 2D Bose gas measured across the Mott-insulator transition
• Unconventional Bose-Einstein Condensations Beyond the "No-node" Theorem
• Unconventional superfluid order in the $F$-band of a bipartite optical square lattice
• Incommensurate superfluidity of bosons in a double-well optical lattice
• Atoms in a radiofrequency-dressed optical lattice

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