论文标题
奥布里过渡中的量子效应
Quantum Effects in the Aubry Transition
论文作者
论文摘要
在两个不超量长度尺度之间的竞争驱动的滑动和固定相之间的Aubry过渡代表了适用于各种显微镜不同系统的范式。尽管以前的理论研究，但它仍然是量子效应在多大程度上改变过渡的范围，或者在实验上可观察到的问题。一个可以潜在地达到量子状态的实验平台最近以捕获的激光冷却离子的形式获得，受到周期性光电位的影响[A. A. Bylinskii，D。Gangloff，I。Counts和V. Vuletic，自然材料15，717（2016）]。使用路径综合蒙特卡洛（PIMC）仿真方法，我们分析了量子隧穿对该系统中滑动到缝线过渡的影响，并根据不稳定和潜在强度确定相图。我们提出了量子Aubry跃迁的新特征，这些特征与热和有限尺寸的效应具有鲁棒性，并且可以在将来的实验中观察到。
The Aubry transition between sliding and pinned phases, driven by the competition between two incommensurate length scales, represents a paradigm that is applicable to a large variety of microscopically distinct systems. Despite previous theoretical studies, it remains an open question to what extent quantum effects modify the transition, or are experimentally observable. An experimental platform that can potentially reach the quantum regime has recently become available in the form of trapped laser-cooled ions subject to a periodic optical potential [A. Bylinskii, D. Gangloff, I. Counts, and V. Vuletic, Nature Materials 15, 717 (2016)]. Using Path-Integral Monte Carlo (PIMC) simulation methods, we analyze the impact of quantum tunneling on the sliding-to-pinned transition in this system, and determine the phase diagram in terms of incommensuration and potential strength. We propose new signatures of the quantum Aubry transition that are robust against thermal and finite-size effects, and that can be observed in future experiments.
