Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02138, USA.
Phys Rev Lett. 2013 Sep 20;111(12):127201. doi: 10.1103/PhysRevLett.111.127201. Epub 2013 Sep 17.
We construct a complete set of local integrals of motion that characterize the many-body localized (MBL) phase. Our approach relies on the assumption that local perturbations act locally on the eigenstates in the MBL phase, which is supported by numerical simulations of the random-field XXZ spin chain. We describe the structure of the eigenstates in the MBL phase and discuss the implications of local conservation laws for its nonequilibrium quantum dynamics. We argue that the many-body localization can be used to protect coherence in the system by suppressing relaxation between eigenstates with different local integrals of motion.
我们构造了一套完整的局域守恒量，它们刻画了多体局域（MBL）相。我们的方法依赖于局域微扰在 MBL 相中局域作用于本征态的假设，这一假设得到了随机 XXZ 自旋链的数值模拟的支持。我们描述了 MBL 相中本征态的结构，并讨论了局域守恒律对其非平衡量子动力学的影响。我们认为，多体局域可以通过抑制不同局域守恒量的本征态之间的弛豫来保护系统的相干性。
