Quantum metamorphism
Quantum metamorphism
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量子变质作用
DOI：
10.1103/physrevb.102.224307
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发表时间：
2020
影响因子：
3.7
通讯作者：
Munro W. J.
中科院分区：
文献类型：
--
作者：
Bastidas V. M.;Estarellas M. P.;Osada T.;Nemoto Kae;Munro W. J.
晶体形成规则而坚固的结构，在极端条件下可以熔化并重结晶成不同的排列，这一过程称为晶体变质作用。虽然晶体是由于空间中连续平移对称性的破缺而存在的，但最近有人提出，离散晶序也可以在时间中出现，并产生一种新的物质相，称为离散时间晶体（DTC）。在本文中，我们结合这两个想法，提出了一个具有不同周期的两个 DTC 之间的量子变质模型。在我们的模型中，变质作用的条件来自于 -DTC 哈密顿量中微扰项的调制，逐渐融化其结构并将其转变为 a-DTC。从周期性驱动系统的多体物理学的角度详细研究了这个过程。我们还提出了一种使用当前量子技术来实验观察量子变质作用的协议。
Crystals form regular and robust structures that under extreme conditions can melt and recrystallize into different arrangements in a process that is called crystal metamorphism. While crystals exist due to the breaking of a continuous translation symmetry in space, it was recently proposed that discrete crystalline order can also emerge in time and give rise to a novel phase of matter named the discrete time crystal (DTC). In this paper, we join these two ideas and propose a model for quantum metamorphism between two DTCs with different periodicities,- and-DTCs. In our model the conditions for metamorphism come from the modulation of perturbative terms in the-DTC Hamiltonian that gradually melt its structure and transform it into a-DTC. This process is studied in detail from the viewpoint of many-body physics of periodically driven systems. We also propose a protocol to experimentally observe quantum metamorphism using current quantum technology.