arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.11253cond-mat.quant-gas
收藏

腔-玻色子系统中的Mott跃迁:理论与实验的定量比较

Mott transition in a cavity-boson system: A quantitative comparison between theory and experiment

Rui Lin, Christoph Georges, Jens Klinder, Paolo Molignini, Miriam Büttner, Axel U. J. Lode, R. Chitra, Andreas Hemmerich, Hans Keßler

摘要:

在腔-玻色子系统中,短程相互作用和腔介导的无限程相互作用之间的竞争导致了自组织区域内的超流相和Mott绝缘体相的存在。在这项工作中,我们定量地比较了在实验中测得的这种过渡的稳态相边界和模拟使用的多构型的时间相关的Hartree方法不可区分的粒子。为了使问题在计算上可行,我们用二维四势阱的精确多体波函数来表示整个系统。我们认为,这种表示的有效性来自于腔原子系统和玻色-哈伯德物理的性质。此外,我们表明,所选择的表示只会引起小的系统误差,实验测量和理论预测的相位边界同意合理。因此,我们展示了一种新的方法,定量数值确定的超流-莫特绝缘体相边界。

英文摘要:

The competition between short-range and cavity-mediated infinite-range interactions in a cavity-boson system leads to the existence of a superfluid phase and a Mott-insulator phase within the self-organized regime. In this work, we quantitatively compare the steady-state phase boundaries of this transition measured in experiments and simulated using the Multiconfigurational Time-Dependent Hartree Method for Indistinguishable Particles. To make the problem computationally feasible, we represent the full system by the exact many-body wave function of a two-dimensional four-well potential. We argue that the validity of this representation comes from the nature of both the cavity-atomic system and the Bose-Hubbard physics. Additionally we show that the chosen representation only induces small systematic errors, and that the experimentally measured and theoretically predicted phase boundaries agree reasonably. We thus demonstrate a new approach for the quantitative numerical determination of the superfluid--Mott-insulator phase boundary.

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。

↑