# Bound-State Band Reconstruction and Resonance in Spin-1/2 Bose Gas with 1D Spin-Orbit Coupling

## TL;DR

This paper investigates how 1D spin-orbit coupling in a two-component Bose gas leads to the reconstruction of bound-state bands and the emergence of multiple resonances, with potential experimental observability.

## Contribution

It reveals the effects of finite Raman coupling on bound-state band structure and resonance phenomena in spin-orbit coupled Bose gases, providing new insights into their many-body physics.

## Key findings

- Reconstruction of three bound-state bands due to Raman coupling.
- Multiple resonances can be induced at finite scattering lengths.
- Tuning intra-species interactions can control bound-state bands and resonances.

## Abstract

In this work, we study two-body bound states in two-component Bose gas with a one-dimensional (1D) spin-orbit coupling (SOC) induced by Raman lasers. The finite Raman coupling strength generates coupling among three spin channels, resulting in the reconstruction of three bound-state bands. In addition, multiple resonances can be induced at finite scattering lengths. By tuning the interaction in one intra-species channel, one bound-state band can be lifted and three resonances can be achieved at different center-of-mass momenta, which can be observable under current experimental conditions in ${}^{87}$Rb atoms.