Collapses-revivals phenomena induced by weak magnetic flux in diamond chain

doi:10.1088/1674-1056/ab6087

中国物理B ›› 2020, Vol. 29 ›› Issue (1): 10306-010306.doi: 10.1088/1674-1056/ab6087

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Collapses-revivals phenomena induced by weak magnetic flux in diamond chain

Na-Na Chang(常娜娜), Wen-Quan Jing(景文泉), Yu Zhang(张钰), Ai-Xia Zhang(张爱霞), Ju-Kui Xue(薛具奎), Su-Peng Kou(寇谡鹏)

1 Department of Physics, Beijing Normal University, Beijing 100875, China;
2 College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China

收稿日期:2019-08-19 修回日期:2019-11-13 出版日期:2020-01-05 发布日期:2020-01-05
通讯作者: Na-Na Chang, Su-Peng Kou E-mail:nnchangqq@gmail.com;spkou@bnu.edu.cn
基金资助:
Project supported the National Natural Science Foundation of China (Grant Nos. 11974053, 11674026, 11274255, 11305132, and 11475027) and China Scholarship Council (CSC).

Collapses-revivals phenomena induced by weak magnetic flux in diamond chain

Na-Na Chang(常娜娜)¹, Wen-Quan Jing(景文泉)², Yu Zhang(张钰)¹, Ai-Xia Zhang(张爱霞)², Ju-Kui Xue(薛具奎)², Su-Peng Kou(寇谡鹏)¹

1 Department of Physics, Beijing Normal University, Beijing 100875, China;
2 College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China

Received:2019-08-19 Revised:2019-11-13 Online:2020-01-05 Published:2020-01-05
Contact: Na-Na Chang, Su-Peng Kou E-mail:nnchangqq@gmail.com;spkou@bnu.edu.cn
Supported by:
Project supported the National Natural Science Foundation of China (Grant Nos. 11974053, 11674026, 11274255, 11305132, and 11475027) and China Scholarship Council (CSC).

摘要/Abstract

摘要： We investigate the quantum dynamical behaviors of bosons in a diamond chain with weak magnetic flux (WMF), including Landau-Zener tunnelling, Bloch oscillations, localization phenomenon, and collapses-revivals phenomena. We observed that collapses-revivals phenomena can occur in diamond chain with WMF and cannot exist in the strong magnetic flux case as the previous study (Chang N N and Xue J K, 2018, Chin. Phys. B 27 105203). Induced by WMF, the energy band for the system varies from gapless to gapped structure. The position of the extrema of probability amplitude for ground state can also be altered by WMF within a single diamond plaquette. As a consequence, the transitions between different dynamical behaviors of bosons in diamond chain can be manipulated by WMF, depending on its initial configurations.

关键词: collapses-revivals phenomena, Bloch oscillations, Landau-Zener tunneling, localization phenomenon, flat band

Abstract: We investigate the quantum dynamical behaviors of bosons in a diamond chain with weak magnetic flux (WMF), including Landau-Zener tunnelling, Bloch oscillations, localization phenomenon, and collapses-revivals phenomena. We observed that collapses-revivals phenomena can occur in diamond chain with WMF and cannot exist in the strong magnetic flux case as the previous study (Chang N N and Xue J K, 2018, Chin. Phys. B 27 105203). Induced by WMF, the energy band for the system varies from gapless to gapped structure. The position of the extrema of probability amplitude for ground state can also be altered by WMF within a single diamond plaquette. As a consequence, the transitions between different dynamical behaviors of bosons in diamond chain can be manipulated by WMF, depending on its initial configurations.

Key words: collapses-revivals phenomena, Bloch oscillations, Landau-Zener tunneling, localization phenomenon, flat band

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

05.30.Jp (Boson systems) 03.75.Mn (Multicomponent condensates; spinor condensates) 67.85.Hj (Bose-Einstein condensates in optical potentials)

常娜娜, 景文泉, 张钰, 张爱霞, 薛具奎, 寇谡鹏. Collapses-revivals phenomena induced by weak magnetic flux in diamond chain[J]. 中国物理B, 2020, 29(1): 10306-010306.

Na-Na Chang(常娜娜), Wen-Quan Jing(景文泉), Yu Zhang(张钰), Ai-Xia Zhang(张爱霞), Ju-Kui Xue(薛具奎), Su-Peng Kou(寇谡鹏). Collapses-revivals phenomena induced by weak magnetic flux in diamond chain[J]. Chin. Phys. B, 2020, 29(1): 10306-010306.

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Collapses-revivals phenomena induced by weak magnetic flux in diamond chain

Collapses-revivals phenomena induced by weak magnetic flux in diamond chain

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