论文标题
观察双孔中驱动的费米气体中磁相关的符号逆转
Observation of the Sign Reversal of the Magnetic Correlation in a Driven-Dissipative Fermi Gas in Double Wells
论文作者
论文摘要
我们报告了双孔中耗散性费米气体中从抗铁磁磁性到铁磁的磁相关的磁相关的观察，利用以受控方式受到现场两体损失引起的耗散。我们系统地测量了在孤立的双孔光学晶格中最近邻居自旋相关的动力学，以及从孤立的双孔晶格到一维均匀晶格的交叉。在孤立的双孔晶格上的各种晶格构型中，我们观察到铁磁自旋相关性，这与长期限制中预期的dicke类型相关性一致。这项工作证明了随着耗散的开放量子系统中量子磁性的控制。
We report the observation of the sign reversal of the magnetic correlation from antiferromagnetic to ferromagnetic in a dissipative Fermi gas in double wells, utilizing the dissipation caused by on-site two-body losses in a controlled manner. We systematically measure dynamics of the nearest-neighbor spin correlation in an isolated double-well optical lattice, as well as a crossover from an isolated double-well lattice to a one-dimensional uniform lattice. In a wide range of lattice configurations over an isolated double-well lattice, we observe a ferromagnetic spin correlation, which is consistent with a Dicke type of correlation expected in the long-time limit. This work demonstrates the control of quantum magnetism in open quantum systems with dissipation.
