Reduced Fidelity Susceptibility in One-Dimensional Transverse Field Ising Model

Eigenstate thermalization in the two-dimensional transverse field Ising model.

We study the onset of eigenstate thermalization in the two-dimensional transverse field Ising model (2D-TFIM) in the square lattice. We consider two nonequivalent Hamiltonians: the ferromagnetic 2D-TFIM and the antiferromagnetic 2D-TFIM in the presence of a uniform longitudinal field. We use full exact diagonalization to examine the behavior of quantum chaos indicators and of the diagonal matri...

Quantum phase transitions in the transverse one-dimensional Ising model with four-spin interactions

Nonequilibrium Steady State in a Quantum System: One-Dimensional Transverse Ising Model with Energy Current

We study the nonequilibrium steady states of an Ising chain in a transverse field h by investigating the effect of a field l, which drives the current of energy. The zero-temperature, h-l phase diagram is determined exactly, and it is found that the energy current appears continuously above a threshold l . lcshd. The long-range magnetic order (present for h , hc , l , lc) is destroyed in the cu...

Dynamical quantum phase transitions in the transverse-field Ising model.

A phase transition indicates a sudden change in the properties of a large system. For temperature-driven phase transitions this is related to nonanalytic behavior of the free energy density at the critical temperature: The knowledge of the free energy density in one phase is insufficient to predict the properties of the other phase. In this Letter we show that a close analogue of this behavior ...

Complete Wetting in the Three-Dimensional Transverse Ising Model

We consider a three-dimensional Ising model in a transverse magnetic field, h and a bulk field H. An interface is introduced by an appropriate choice of boundary conditions. At the point (H = 0, h = 0) spin configurations corresponding to different positions of the interface are degenerate. By studying the phase diagram near this multiphase point using quantum-mechanical perturbation theory we ...