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arXiv 2107.11547cond-mat.quant-gasphysics.atm-clus
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Hofstadter带原子凝聚态的动力学制备

Dynamical preparation of an atomic condensate in a Hofstadter band

Han Fu, Andreas Glatz, F. Setiawan, Kai-Xuan Yao, Zhendong Zhang, Cheng Chin, K. Levin

摘要:

在具有非平凡拓扑特征的量子体系中创建哈密顿量是冷原子社区的中心目标,从而能够广泛探索量子物质的新相。合成这种哈密顿量的一般方案是基于光晶格的动态调制,从而产生矢量势。同时,调制可能导致加热和平衡的严重困难。在这里,我们表明,这些挑战可以克服演示如何霍夫施塔特玻色-爱因斯坦凝聚体(BEC)可以动态实现,使用实验协议。从Gross-Pitaevskii模拟,我们的研究揭示了一个复杂的,多阶段的演变,这包括一个混乱的中间“加热”阶段,然后自发重新进入BEC。观察到的行为让人想起宇宙学模型中的进化。

英文摘要:

The creation of a Hamiltonian in the quantum regime which has non-trivial topological features is a central goal of the cold-atom community, enabling widespread exploration of novel phases of quantum matter. A general scheme to synthesize such Hamiltonians is based on dynamical modulation of optical lattices which thereby generate vector potentials. At the same time the modulation can lead to heating and serious difficulties with equilibration. Here we show that these challenges can be overcome by demonstrating how a Hofstadter Bose-Einstein condensate (BEC) can be dynamically realized, using experimental protocols. From Gross-Pitaevskii simulations our study reveals a complex, multistage evolution; this includes a chaotic intermediate "heating" stage followed by a spontaneous reentrance to the BEC. The observed behavior is reminiscent of evolution in cosmological models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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