Controlling directed atomic motion and second-order tunneling of a spin-orbit-coupled atom in optical lattices
Controlling directed atomic motion and second-order tunneling of a spin-orbit-coupled atom in optical lattices
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控制光学晶格中自旋轨道耦合原子的定向原子运动和二阶隧道效应
DOI：
10.1103/physreva.103.043315
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发表时间：
2020-11
影响因子：
2.9
通讯作者：
Chen Ai-Xi
中科院分区：
文献类型：
--
作者：
Luo Xiaobing;Zeng Zhao-Yun;Guo Yu;Yang Baiyuan;Xiao Jinpeng;Li Lei;Kong Chao;Chen Ai-Xi
从理论上讲，我们探索了一个旋转式轨道偶联原子的Bose-Hubbard（BH）模型的隧道动力学和动力学定位（DL），该模型被困在摇摇欲坠的光学晶格中，受到晶格的摇动和时间 - 周期性的Zeeman Field。通过
We theoretically explore the tunneling dynamics and dynamical localization (DL) for the Bose-Hubbard (BH) model of a single spin-orbit-coupled atom trapped in an optical lattice subjected to lattice shaking and to time-periodic Zeeman field. By means of analytical and numerical methods, we demonstrate that the spin-orbit (SO) coupling adds some new results to the DL phenomenon in both multiphoton resonance and far-off-resonance parameter regimes. When the driving frequency is resonant with the static Zeeman field (multi-photon resonances), we obtain an unexpected new DL phenomenon where the single SO-coupled atom is restricted to making perfect two-site Rabi oscillation accompanied by spin flipping. By using the unconventional DL phenomenon, we are able to generate a ratchetlike effect which enables directed atomic motion towards different directions and accompanies periodic spin-flipping under the action of SO coupling. For the far-off-resonance case, we show that by suppressing the usual inter-site tunneling alone, it is possible to realize a type of spin-conserving second-order tunneling between next-nearest-neighboring sites, which is not accessible in the conventional lattice system without SO coupling. We also show that simultaneous controls of the usual inter-site tunneling and the SO-coupling-related second-order-tunneling are necessary for quasienergies flatness (collapse) and DL to exist. These results may be relevant to potential applications such as spin-based quantum information processing and design of novel spintronics devices.
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影响因子：
2.9
作者：
Xu, Zhi-Fang;You, Li;Ueda, Masahito
通讯作者：
Ueda, Masahito
影响因子：
56.9
作者：
Bernevig, B. Andrei;Hughes, Taylor L.;Zhang, Shou-Cheng
通讯作者：
Zhang, Shou-Cheng
影响因子：
2.9
作者：
Zi-Fa Yu;J. Xue
通讯作者：
Zi-Fa Yu;J. Xue
DOI：
10.1007/bf01313554
发表时间：
1991-06
期刊：
Zeitschrift für Physik B Condensed Matter
影响因子：
--
作者：
F. Grossmann;P. Jung;T. Dittrich;P. Hänggi
通讯作者：
F. Grossmann;P. Jung;T. Dittrich;P. Hänggi
影响因子：
8.6
作者：
Hamner, C.;Zhang, Yongping;Engels, P.
通讯作者：
Engels, P.