arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1908.09870cond-mat.quant-gas
收藏

倾斜莫特绝缘体中的增强超交换

Enhanced Superexchange in a Tilted Mott Insulator

Ivana Dimitrova, Niklas Jepsen, Anton Buyskikh, Araceli Venegas-Gomez, Jesse Amato-Grill, Andrew Daley, Wolfgang Ketterle

摘要:

在光晶格中,通过一阶隧穿的熵和质量输运比通过超交换的自旋输运快得多。在这里,我们表明,增加一个恒定的力(倾斜)抑制一阶隧穿,但不自旋输运,实现新的功能自旋哈密顿。抑制超流转变可以稳定具有更快自旋动力学的更大系统。这是第一次在多体自旋系统中,我们改变超交换率超过100倍,并通过倾斜调整自旋-自旋相互作用。在倾斜晶格中,缺陷是固定的,可以研究纯自旋动力学。

英文摘要:

In an optical lattice entropy and mass transport by first-order tunneling is much faster than spin transport via superexchange. Here we show that adding a constant force (tilt) suppresses first-order tunneling, but not spin transport, realizing new features for spin Hamiltonians. Suppression of the superfluid transition can stabilize larger systems with faster spin dynamics. For the first time in a many-body spin system, we vary superexchange rates by over a factor of 100 and tune spin-spin interactions via the tilt. In a tilted lattice, defects are immobile and pure spin dynamics can be studied.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑