Tunneling dynamics of bosons in the diamond lattice chain

doi:10.1088/1674-1056/27/10/105203

Abstract

We analyze the effect of tilting and artificial magnetic flux, on the energy bands structure for the system and the corresponding tunneling dynamics for bosons with various initial configurations in the diamond lattice chain, where intriguing and significant phenomena occur, including Landau-Zener tunneling, Bloch oscillations, and localization phenomenon. Both vertical tilting and artificial magnetic flux may alter the structure of energy levels (dispersion structure or flat band), and enforce the occurrence of Landau-Zener tunneling, which scans the whole of the Bloch bands. We find that, transitions among Landau-Zener tunneling, Bloch oscillations, and localization phenomenon, are not only closely related to the energy bands structure, but also depends on the initial configuration of bosons in the diamond lattice chain. As a consequence, Landau-Zener tunneling, Bloch oscillations, and localization phenonmenon of bosons always counteract and are complementary with each other in the diamond lattice chain.

Keywords: Bose-Einstein condensate Landau-Zener tunneling Bloch oscillation localization flat band

Received: 27 June 2018
Revised: 02 August 2018
Accepted manuscript online:

PACS:	52.27.Ep	(Electron-positron plasmas)
	52.38.Hb	(Self-focussing, channeling, and filamentation in plasmas)
	98.70.Rz	(γ-ray sources; γ-ray bursts)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11764039, 11475027, 11865014, 11865014, 11274255, and 11305132), the Natural Science Foundation of Gansu Province, China (Grant No. 17JR5RA076), and the Scientific Research Project of the Higher Education of Gansu Province, China (Grant No. 2016A-005).

Corresponding Authors: Ju-Kui Xue
E-mail: xuejk@nwnu.edu.cn

Cite this article:

Na-Na Chang(常娜娜), Ju-Kui Xue(薛具奎) Tunneling dynamics of bosons in the diamond lattice chain 2018 Chin. Phys. B 27 105203

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