Tunneling dynamics of bosons in the diamond lattice chain

• 来源期刊: 中国物理B（英文版）
• 关键词: Bose–Einstein condensate Landau–Zener tunneling Bloch oscillation localization flat band
• 年，卷（期）: 2018,（10）
• 页码范围: 383-392
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/10/105203

摘要

We analyze the effect of tilting and artificial magnetic flux, on the energy bands structure for the system and the cor-responding 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, transi-tions 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 conse-quence, Landau–Zener tunneling, Bloch oscillations, and localization phenonmenon of bosons always counteract and are complementary with each other in the diamond lattice chain.