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

doi:10.1088/1674-1056/ab6087

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.

Keywords: collapses-revivals phenomena Bloch oscillations Landau-Zener tunneling localization phenomenon flat band

Received: 19 August 2019
Revised: 13 November 2019
Accepted manuscript online:

PACS:	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
	05.30.Jp	(Boson systems)
	03.75.Mn	(Multicomponent condensates; spinor condensates)
	67.85.Hj	(Bose-Einstein condensates in optical potentials)

Fund: Project supported the National Natural Science Foundation of China (Grant Nos. 11974053, 11674026, 11274255, 11305132, and 11475027) and China Scholarship Council (CSC).

Corresponding Authors: Na-Na Chang, Su-Peng Kou
E-mail: nnchangqq@gmail.com;spkou@bnu.edu.cn

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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 2020 Chin. Phys. B 29 010306

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