50 citations · 432 across the 52 of their papers we have counts for
13 papers · 1 filter
Quantum-based solution of time-dependent complex Riccati equations
D. Martínez-Tibaduiza, C. González-Arciniegas, C. Farina +2
Using the Wei-Norman theory we obtain a time-dependent complex Riccati equation (TDCRE) as the solution of the time evolution operator (TEO) of quantum systems described by time-de…
Two-photon spontaneous emission of an atom in a cosmic string background
Lucas Weitzel, Y. Muniz, C. Farina +1
It is well known that the vicinities of an atomic system may substantially affect its radiative properties. In this work, we consider the influence of a cosmic string background in…
Controlling the atom-sphere interaction with an external electric field
P. P. Abrantes, V. Pessanha, Reinaldo de Melo e Souza +1
We investigate the system constituted by a polarizable atom near a nanosphere under the influence of an external electrostatic field, showing that the attractive dispersive force b…
Time-dependent quantum harmonic oscillator: a continuous route from adiabatic to sudden changes
D. Martínez-Tibaduiza, L. Pires, C. Farina
In this work, we provide an answer to the question: how sudden or adiabatic is a change in the frequency of a quantum harmonic oscillator (HO)? To do this, we investigate the behav…
Tuning quantum reflection in graphene with an external magnetic field
Marcius Silvestre, Tarik P. Cysne, Daniela Szilard +2
We theoretically demonstrate that an external magnetic field can be used to control quantum reflection of matter waves in graphene due to its extraordinary magneto-optical properti…
Inhibition of the dynamical Casimir effect with Robin boundary conditions
Andreson L. C. Rego, B. W. Mintz, C. Farina +1
We consider a real massless scalar field in 3+1 dimensions satisfying a Robin boundary condition at a nonrelativistic moving mirror. Considering vacuum as the initial field state,…