84 citations · 304 across the 14 of their papers we have counts for
14 papers
Ground-state properties of the one-dimensional transverse Ising model in a longitudinal magnetic field
O. F. de Alcantara Bonfim, B. Boechat, J. Florencio
The critical properties of the one-dimensional transverse Ising model in the presence of a longitudinal magnetic field were studied by the quantum fidelity method. We used exact di…
Quantum fidelity approach to the ground state properties of the 1D ANNNI model in a transverse field
O. F. de Alcantara Bonfim, B. Boechat, J. Florencio
In this work we analyze the ground-state properties of the one-dimensional ANNNI model in a transverse field using the quantum fidelity approach. We numerically determined…
Critical behavior of a quantum chain with four-spin interactions in the presence of longitudinal and transverse magnetic fields
B. Boechat, J. Florencio, A. Saguia +1
We study the ground-state properties of a spin-1/2 model on a chain containing four-spin Ising-like interactions in the presence of both transverse and longitudinal magnetic fields…
Phase transitions in the two-dimensional super-antiferromagnetic Ising model with next-nearest-neighbor interactions
A. saguia, B. Boechat, O. F. de Alcantara Bonfim +1
We use Monte Carlo and Transfer Matrix methods in combination with extrapolation schemes to determine the phase diagram of the 2D super-antiferromagnetic (SAF) Ising model with nex…
Entanglement Entropy in Random Quantum Spin-S Chains
A. Saguia, M. S. Sarandy, B. Boechat +1
We discuss the scaling of entanglement entropy in the random singlet phase (RSP) of disordered quantum magnetic chains of general spin-S. Through an analysis of the general structu…
Effects of anisotropy on a quantum Heisenberg spin glass in a three-dimensional hierarchical lattice
J. Ricardo de Sousa, Beatriz Boechat, Claudette Cordeiro +1
We study the anisotropic Heisenberg spin-glass model in a three-dimensional hierarchical lattice (designed to approximate the cubic lattice), within a real-space renormalization-gr…