标题： 由双微波场修饰的超冷分子的两体和多体物理 显示英文标题

标题： Two- and many-body physics of ultracold molecules dressed by dual microwave fields

摘要： 我们研究了由双微波以不同极化方式修饰的超冷极性分子的两体和多体物理性质。 使用弗洛凯理论和多通道散射计算，我们确定了一个弹性散射与非弹性散射比最大的区域，这对于进行蒸发冷却是有利的。 此外，我们推导并随后验证了一个有效的相互作用势，该势准确地捕捉了微波屏蔽的极性分子（MSPMs）的动力学。 我们还通过计算气体密度、凝聚分数、动量分布和二阶关联等物理量，探讨了MSPMs超冷气体的基态特性。 结果表明，该系统支持一种弱关联的膨胀气体状态和一种强关联的自束缚气体状态。 由于双微波方案引入了额外的控制旋钮，并且对于创建极性分子的超冷玻色气体至关重要，我们的工作为研究由双微波修饰的超冷极性分子的两体和多体物理铺平了道路。 显示英文摘要

摘要： We investigate the two- and many-body physics of the ultracold polar molecules dressed by dual microwaves with distinct polarizations. Using Floquet theory and multichannel scattering calculations, we identify a regime with the largest elastic-to-inelastic scattering ratio which is favorable for performing evaporative cooling. Furthermore, we derive and, subsequently, validate an effective interaction potential that accurately captures the dynamics of microwave-shielded polar molecules (MSPMs). We also explore the ground-state properties of the ultracold gases of MSPMs by computing physical quantities such as gas density, condensate fraction, momentum distribution, and second-order correlation. It is shown that the system supports a weakly correlated expanding gas state and a strongly correlated self-bound gas state. Since the dual-microwave scheme introduces addition control knob and is essential for creating ultracold Bose gases of polar molecules, our work pave the way for studying two- and many-body physics of the ultracold polar molecules dressed by dual microwaves.