Resonantly enhanced coherence by laser-assisted tunneling

TL;DR

This paper investigates how laser-assisted tunneling can resonantly enhance quantum coherence in strongly interacting cold bosons within a double-well potential, revealing photon absorption/emission patterns.

Contribution

It demonstrates the resonance enhancement of coherence via photon-assisted tunneling in a driven double-well system with static tilt.

Findings

Coherence is resonantly enhanced by photon-assisted tunneling.

Two-branch pattern observed in tilted wells corresponds to photon absorption and emission.

Initial Fock state evolves into coherent states under driving.

Abstract

We study quantum coherence of strongly interacting cold bosons in a double-well potential driven by a laser field. The system is initially in a Fock state and, for either with or without a static tilting field, evolves into the coherent states. The coherence is resonantly enhanced by the photon-assisted tunneling. For the tilted wells, it reveals a two-branch pattern which corresponds to the multiple photon absorption or emission, respectively.