41 citations · 138 across the 26 of their papers we have counts for
3 papers · 1 filter
Thermodynamics of the one-dimensional s=1 XXZ Heisenberg model: analytical results
O. Rojas, E. V. Correa-Silva, W. A. Moura-Melo +2
We apply the results recently derived by Rojas et al. to derive the beta-expansion of the Helmholtz free energy of the spin-1 XXZ Heisenberg model up to 5th order in beta. The anal…
Imaginary Phases in Two-Level Model with Spontaneous Decay
A. C. Aguiar Pinto, M. T. Thomaz
We study a two-level model coupled to the electromagnetic vacuum and to an external classic electric field with fixed frequency. The amplitude of the external electric field is sup…
Adiabatic Approximation in the Density Matrix Approach: Non-Degenerate Systems
A. C. Aguiar Pinto, K. M. Fonseca Romero, M. T. Thomaz
We study the adiabatic limit in the density matrix approach for a quantum system coupled to a weakly dissipative medium. The energy spectrum of the quantum model is supposed to be…