1 citations · 1 across the 1 of their papers we have counts for
5 papers
Phases of the electronic two-level model under the rotating wave approximation
M. T. Thomaz, A. C. Aguiar Pinto, M. Moutinho
We present the time evolution of the electronic two-level model in the rotating wave approximation (RWA). We calculate the Aharonov-Anandan phase of the vector states with cyclic e…
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…
Berry's Phase in the Presence of a Dissipative Medium
K. M. Fonseca Romero, A. C. Aguiar Pinto, M. T. Thomaz
We consider the spin 1/2 model coupled to a slowly varying magnetic field in the presence of a weak damping represented by a Lindblad-form operators. We show that Berry's geometric…
Comment on the Adiabatic Condition
A. C. Aguiar Pinto, M. C. Nemes, J. G. Peixoto de Faria +1
The experimental observation of effects due to Berry's phase in quantum systems is certainly one of the most impressive demonstrations of the correctness of the superposition princ…