Self-induced Bose glass phase in quantum quasicrystals

IF 4.4 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2024-10-01 DOI:10.1016/j.rinp.2024.107991

M. Grossklags , M. Ciardi , V. Zampronio , F. Cinti , A. Mendoza-Coto

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Abstract

We study the emergence of Bose glass phases in self sustained bosonic quasicrystals induced by a pair interaction between particles of Lifshitz–Petrich type. By using a mean-field variational method designed in momentum space as well as Gross–Pitaevskii simulations we determine the phase diagram of the model. The study of the local and global superfluid fraction allows the identification of supersolid, super quasicrystal, Bose glass and insulating phases. The Bose glass phase emerges as a quasicrystal phase in which the global superfluidity is essentially zero, while the local superfluidity remains finite in certain ring structures of the quasicrystalline pattern. Furthermore, we perform continuous space Path Integral Monte Carlo simulations for a case in which the interaction between particles stabilizes a quasicrystal phase. Our results show that as the strength of the interaction between particles is increased the system undergoes a sequence of states consistent with the super quasicrystal, Bose glass, and quasicrystal insulator thermodynamic phases.

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量子准晶体中的自诱导玻色玻璃相

我们研究了在利夫希茨-佩特里希类型粒子之间的成对相互作用诱导下，自持玻色准晶中玻色玻璃相的出现。通过使用动量空间设计的均场变分法以及格罗斯-皮塔耶夫斯基模拟，我们确定了模型的相图。通过对局部和全局超流体部分的研究，我们确定了超固相、超准晶相、玻色玻璃相和绝缘相。玻色玻璃相作为一种准晶相出现，其中全局超流体基本上为零，而在准晶模式的某些环状结构中，局部超流体仍然是有限的。此外，我们还对粒子之间的相互作用使准晶体相稳定的情况进行了连续空间路径积分蒙特卡洛模拟。我们的结果表明，随着粒子间相互作用强度的增加，系统会经历一连串与超准晶体、玻色玻璃和准晶绝缘体热力学相一致的状态。

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

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