论文标题
在环上强烈相互作用的多组分玻色气中的持续电流
Persistent currents in a strongly interacting multicomponent Bose gas on a ring
论文作者
论文摘要
我们考虑在紧密限制的一维环陷阱中进行强烈排斥相互作用的两组分子混合物，并受到人造量规场的影响。通过使用Bethe Ansatz精确溶液进行多体波函数，我们获得了基态能量和持续电流。对于所施加的通量的每个值，然后确定粒子交换下状态的对称性。我们发现，相对于非相互作用颗粒的情况，基态能量和持续电流表现出降低的周期性，对应于每个粒子具有分数角动量的状态。我们将这种效果与在人造量规场的影响下的基态对称性变化相关。我们的结果概括了先前报道的用于具有吸引力和排斥性相互作用的费米子混合物的结果，并突出了对称性在这种效果中的作用
We consider a two-component Bose-Bose mixture at strong repulsive interactions in a tightly confining, one-dimensional ring trap and subjected to an artificial gauge field. By employing the Bethe Ansatz exact solution for the many-body wavefunction, we obtain the ground state energy and the persistent currents. For each value of the applied flux, we then determine the symmetry of the state under particles exchange. We find that the ground-state energy and the persistent currents display a reduced periodicity with respect to the case of non-interacting particles, corresponding to reaching states with fractional angular momentum per particle. We relate this effect to the change of symmetry of the ground state under the effect of the artificial gauge field. Our results generalize the ones previously reported for fermionic mixtures with both attractive and repulsive interactions and highlight the role of symmetry in this effect
