Floquet spinor Bose gases

被引：8

作者：

Fujimoto, Kazuya ^{[1
]}

Uchino, Shun ^{[2
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[2] Waseda Univ, Waseda Inst Adv Study, Shinjuku Ku, Tokyo 1698050, Japan

来源：

PHYSICAL REVIEW RESEARCH | 2019年 / 1卷 / 03期

关键词：

PERIODICALLY DRIVEN; QUANTUM; MAGNETISM; DYNAMICS; PHYSICS; MATTER; STATE;

D O I：

10.1103/PhysRevResearch.1.033132

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a Floquet spinor Bose-Einstein condensate induced by a periodically driven quadratic Zeeman coupling whose frequency is larger than any other energy scales. By examining a spin-1 system available in ultracold atomic gases, we demonstrate that such an external driving field has great effect on the condensate through emergence of a unique spin-exchange interaction. We uncover that the ferromagnetic condensate has several unconventional stationary states and thus exhibits rich continuous phase transitions. On the other hand, the antiferromagnetic condensate is found to possess a nontrivial metastable region, which supports unusual elementary excitations and hysteresis phenomena.

引用

页数：11

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