Dressing the Orbital Feshbach Resonance using single-manifold Raman scheme

TL;DR

This paper proposes a single-manifold Raman scheme to control the Orbital Feshbach Resonance in alkaline earth-like atoms, enabling optical tuning of interactions and facilitating studies of BCS-BEC crossover and Kondo physics.

Contribution

It introduces a novel Raman dressing method for OFR that is experimentally feasible and enables optical control of atomic interactions and many-body phenomena.

Findings

Raman scheme shifts the OFR using optical fields.

Induces an optical-dependent two-body bound state.

Enables Raman coupling induced BCS-BEC crossover.

Abstract

The recently discovered Orbital Feshbach Resonance (OFR) offers the possibility of tuning the interaction between alkaline earth(-like) metal atoms with magnetic field. Here, we introduce a single-manifold Raman scheme to dress the OFR, which allows us to tune the interaction with the optical field and it is readily realizable in experiment. We demonstrate the scattering resonance could be shifted by the dressing Raman laser using few-body and many-body mean-field calculation, which give rise to an optical dependent two-body bound state and Raman coupling induced BCS-BEC crossover in the BCS-type mean field theory. Besides, we also discuss the application of single-manifold Raman scheme in Kondo research by writing down a Kondo lattice model.