Symmetry breaking and entropy production during the evolution of spinor Bose-Einstein condensate driven by coherent atom beam

TL;DR

This paper investigates how a coherent atom beam influences the evolution of a spinor Bose-Einstein condensate, revealing spontaneous symmetry breaking and controllable spin distributions through entropy analysis.

Contribution

It introduces a new method to control and probe the spin distribution of a condensate via atom-beam scattering, highlighting symmetry breaking and entropy dynamics.

Findings

Spontaneous symmetry breaking occurs during condensate evolution.

Stationary spin distribution can be controlled by the incident atom beam.

Entropy production rate provides insights into the system's dynamics.

Abstract

The spinor condensate with spin states degenerated in the ground spin-space provides a unique platform for investigating the edge of quantum mechanics and statistical physics. We study the evolution of the condensate under the scattering of a coherent atom beam. The time-dependent magnetization, entanglement entropy, thermal entropy and the entropy production rate are calculated. A novel spontaneous symmetry breaking is found during the evolution, It is shown that the stationary spin distribution can be controlled by the incoming coherent spin state of the incident atom beam, therefore the atom-condensate scattering provides a new way to probe the spin distribution of the condensate