Dynamical quantum phase transitions in presence of a spin bath

被引：5

作者：

Gomez-Leon, A. ^{[1
]}

Stamp, P. C. E.

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC, Canada

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

TOPOLOGICAL INSULATOR; RANGE INTERACTIONS; DISORDERED MAGNET; SYSTEMS; STATE; MAGNETIZATION; PROPAGATION; SIMULATOR; HUNDREDS;

D O I：

10.1103/PhysRevB.95.054402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We derive an effective time independent Hamiltonian for the transverse Ising model coupled to a spin bath, in the presence of a high frequency AC magnetic field. The spin blocking mechanism that removes the quantum phase transition can be suppressed by the AC field, allowing tunability of the quantum critical point. We calculate the phase diagram, including the nuclear spins, and apply the results to quantum Ising systems with long-range dipolar interactions; the example of LiHoF4 is discussed in detail.

引用

页数：11

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