A momentum dependent optical lattice induced by artificial gauge potential

TL;DR

This paper introduces a method to create a momentum-dependent optical lattice in ultracold Bose gases using artificial gauge potentials, enabling control over quantum phase transitions.

Contribution

It presents a feasible experimental scheme to generate a transverse momentum-dependent optical lattice via a periodically driven Raman process, advancing control in ultracold atom systems.

Findings

Superfluid--Mott-insulator transition can be tuned by atomic transverse momentum.

The proposed method is supported by strong-coupling and quantum Monte Carlo calculations.

Potential applications in quantum simulation and control of many-body systems.

Abstract

We propose an experimentally feasible method to generate a one-dimensional optical lattice potential in an ultracold Bose gas system that depends on the transverse momentum of the atoms. The optical lattice is induced by the artificial gauge potential generated by a periodically driven multi-laser Raman process, which depends on the transverse momentum of the atoms. We study the many-body Bose-Hubbard model in an effective 1D case and show that the superfluid--Mott-insulator transition can be controlled via tuning the transverse momentum of the atomic gas. We examined our prediction via a strong-coupling expansion to an effective 1D Bose-Hubbard model and a quantum Monte Carlo calculation, and discuss possible applications of our system.