Tuning the superfluid - Mott insulator transition in a resonantly strongly driven Bose - Einstein condensate in an optical lattice

TL;DR

This paper investigates how resonant strong driving with an external electromagnetic field can tune the superfluid-Mott insulator transition in a Bose-Einstein condensate within an optical lattice, revealing controllable critical parameters.

Contribution

It demonstrates that external electromagnetic driving allows precise tuning of the transition point and modifies the potential depths at the phase transition in a BEC system.

Findings

Critical transition parameters depend on external field Rabi frequency and detuning.

Resonant strong driving introduces two optical potential depths at the phase transition.

Driving shifts the transition point compared to undriven systems.

Abstract

We have studied the superfluid - Mott insulator transition in a BEC confined in an optical lattice and driven by an additional external electromagnetic field, which excites another internal state. It is shown that due to resonant strong driving the critical values of the transition parameter depend on external field parameters (the Rabi frequency and the detuning from resonance) and can be tuned to a given value. It is also shown that for driven system there are two optical potential depths at a phase transition which are always more than without driving.