Dynamical quantum phase transitions in presence of a spin bath

Article

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

DOI  :  10.1103/PhysRevB.95.054402

来源: SCIE

【 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.

【 授权许可】

Free