Nonequilibrium Quantum Magnetism in a Dipolar Lattice Gas
Nonequilibrium Quantum Magnetism in a Dipolar Lattice Gas
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DOI：
10.1103/physrevlett.111.185305
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发表时间：
2013-10-30
影响因子：
8.6
通讯作者：
Laburthe-Tolra, B.
中科院分区：
文献类型：
--
作者：
de Paz, A.;Sharma, A.;Laburthe-Tolra, B.
我们报道了利用简并偶极气体在光学晶格中实现量子磁性。我们的系统实现了一个类似于著名的t-J模型的晶格模型。它的特点是由非局域偶极子-偶极子相互作用提供的局域类海森堡自旋-自旋相互作用产生的非平衡自旋动力学。此外，由于其大的自旋，我们的铬晶格气体为研究高自旋系统的量子磁性提供了一个很好的环境，正如在双占位点观察到的复杂自旋动力学所说明的那样。
We report on the realization of quantum magnetism using a degenerate dipolar gas in an optical lattice. Our system implements a lattice model resembling the celebrated t-J model. It is characterized by a nonequilibrium spinor dynamics resulting from intersite Heisenberg-like spin-spin interactions provided by nonlocal dipole-dipole interactions. Moreover, due to its large spin, our chromium lattice gases constitute an excellent environment for the study of quantum magnetism of high-spin systems, as illustrated by the complex spin dynamics observed for doubly occupied sites.