12 citations · 12 across the 5 of their papers we have counts for
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Nonlinear effects on the dynamics of quantum harmonic modes coupled through angular momentum
N. Canosa, R. Rossignoli, Javier Garcia +2
We investigate nonlinear effects on the dynamics of entanglement and other quantum observables in a system of two harmonic modes coupled through angular momentum. The nonlinearity…
Spectrum and normal modes of non-hermitian quadratic boson operators
Javier Garcia, R. Rossignoli
We analyze the spectrum and normal mode representation of general quadratic bosonic forms not necessarily hermitian. It is shown that in the one-dimensional case such forms exh…
On two different kinds of resonances in one-dimensional quantum-mechanical models
Francisco M. Fernández, Javier Garcia
We apply the Riccati-Padé method and the Rayleigh-Ritz method with complex rotation to the study of the resonances of a one-dimensional well with two barriers. The model exhibits t…
Three PT-symmetric Hamiltonians with completely different spectra
Francisco M. Fernández, Javier Garcia
We discuss three Hamiltonians, each with a central-field part and a PT-symmetric perturbation . When is the isotropic Harmonic oscillator the spectrum is real…
Highly accurate calculation of the resonances in the Stark effect in hydrogen
Francisco M Fernández, Javier Garcia
We obtained accurate resonances for the Stark effect in hydrogen by means of three independent methods. Two of them are based on complex rotation of the coordinates and diagonaliza…
On recent calculations of resonances for the Stark effect in hydrogen
Francisco M. Fernández, Javier Garcia
We show that the resonances of the Stark effect in hydrogen reported in Phys. Rev. A \textbf{88}, 022509 (2013) are considerably less accurate than the number of digits appear to s…