Pair condensation of bosonic atoms induced by optical lattices

TL;DR

This paper proposes a new model for bosonic atoms in optical lattices that predicts multiple phases, including a pair condensate, using a non-perturbative approach feasible with current experimental setups.

Contribution

The paper introduces a novel correlated hopping model for bosons in optical lattices that naturally supports pair condensation without relying on perturbative effects.

Findings

Identifies three phases: Mott insulator, charge density wave, and pair quasi-condensate.

Model is realizable with current experimental techniques.

Demonstrates non-perturbative pairing mechanism in bosonic systems.

Abstract

We design a model of correlated hopping for bosonic atoms in optical lattices. Such model exhibits three kinds of phases, comprehending a Mott insulator, a charge density wave and a pair quasi-condensate. The implementation of the model relies on two-state atoms embedded in state-dependent lattices and having spin-dependent interactions. Contrary to other models of pairing, our design is not based on perturbative effects and should be observable in current experiments.