Quantum droplet of a two-component Bose gas in an optical lattice near the Mott insulator transition
Quantum droplet of a two-component Bose gas in an optical lattice near the Mott insulator transition
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DOI：
10.1103/physreva.105.l031301
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发表时间：
2021-09
影响因子：
2.9
通讯作者：
Y. Machida;I. Danshita;D. Yamamoto;K. Kasamatsu
中科院分区：
文献类型：
--
作者：
Y. Machida;I. Danshita;D. Yamamoto;K. Kasamatsu
我们从理论上研究了具有外部陷阱电势的双组分 BoseHubbard 系统中量子液滴的动态形成。具体来说，由双重填充的莫特绝缘体包围的中心区域的超流体形成量子液滴，由于两相之间量子相变的不连续性质，该液滴是自束缚的。我们展示了如何通过在二维系统中使用瞬态 Gutzwiller 模拟来控制陷阱电位来诱导液滴的特征行为。液滴的静态和动态特性可以通过具有三次五次非线性的有效Ginzburg-Landau场论定性地描述，其中尽管所有裸颗粒间相互作用都是排斥的，但仍出现了有吸引力的三次非线性。
We theoretically study dynamical formation of a quantum droplet in a two-component BoseHubbard system with an external trap potential. Specifically, the superfluid in the central region surrounded by the Mott insulator with double filling forms a quantum droplet, which is self-bound thanks to the discontinuous nature of the quantum phase transition between the two phases. We show how to induce the characteristic behavior of the droplet through the control of the trap potential by using the time-dependent Gutzwiller simulations in a two-dimensional system. The static and dynamical properties of the droplet can be described qualitatively by the effective Ginzburg-Landau field theory with cubic-quintic nonlinearities, where the attractive cubic nonlinearlity emerges although all the bare interparticle interactions are repulsive.