Flat band quantum scar
Flat band quantum scar
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平带量子疤痕
DOI：
10.1103/physrevb.102.241115
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发表时间：
2020
影响因子：
3.7
通讯作者：
Hatsugai Yasuhiro
中科院分区：
文献类型：
--
作者：
Kuno Yoshihito;Mizoguchi Tomonari;Hatsugai Yasuhiro
我们证明了一个量子疤痕态，一个非典型的本征态破坏本征态热化假设嵌入在一个多体的能量谱，可以构建在平带系统。我们构造的关键思想是利用正交的紧局域态。我们具体讨论了我们的构造方案，并以一个平坦的晶格系统为例，数值证明了量子疤痕态的存在。高维系统的例子也得到了解决。我们的量子疤痕的构造方法在各种平带系统中有着广泛的应用。
We show that a quantum scar state, an atypical eigenstate breaking eigenstate thermalization hypothesis embedded in a many-body energy spectrum, can be constructed in flat band systems. The key idea of our construction is to make use of orthogonal compact localized states. We concretely discuss our construction scheme, taking a sawtooth flat lattice system as an example, and numerically demonstrate the presence of a quantum scar state. Examples of higher-dimensional systems are also addressed. Our construction method of quantum scar has broad applications to various flat band systems.