arXiv subjects

R. Juárez-Amaro

Publications and source records attributed to R. Juárez-Amaro.

6 recordsLinked to original sources

arXiv2013

Intrinsic decoherence in the interaction of two fields with a two-level atom

We study the interaction of a two-level atom and two fields, one of them classical. We obtain an effective Hamiltonian for this system by using a method recently introduced that produces a small rotation to the Hamiltonian that allows to neglect some terms in the rotated Hamiltonian. Then we solve a variation of the Schrödinger equation that models decoherence as the system evolves through intrinsic mechanisms beyond conventional quantum mechanics rather than dissipative interaction with an environment.

quant-ph↗

arXiv2013

M00N states in ion-laser interactions

A new class of entangled states, similar to N00N states is introduced. We call these states M00N states as the excitations shared in both subsystems do not need to be equal. The generation proposed here does not need conditional measurements, and therefore is achieved in a deterministic manner.

quant-ph↗

arXiv2013

Solution for the dispersive and dissipative atom-field Hamiltonian under time dependent linear amplification processes

The dispersive interaction between a two-level atom and a quantized field is studied. We consider besides a time dependent linear amplification and dissipative processes. In order to solve the master equation for this system, we use superoperator techniques.

quant-ph↗

arXiv2010

Exact solution of the ion-laser interaction in all regimes

We show that in the trapped ion-laser interaction all the regimes may be considered analytically. We may solve not only for different laser intensities, but also away from resonance and from the Lamb-Dicke regime. It is found a dispersive Hamiltonian for the high intensity regime, that, being diagonal, its evolution operator may be easily calculated.

quant-ph↗

arXiv2008

Solution of Master Equations for the anharmonic oscillator interacting with a heat bath and for parametric down conversion process

We solve analytically master equations that describe a cavity filled with a kerr medium, taking into account the dissipation induced by the environment, and parametric down conversion processes. We use superoperator techniques.

quant-ph↗

arXiv2008

Useful transformations: from ion-laser interactions to master equations

We show set of transformations which allow to obtain analytic solutions in several quantum-optical problems. We start with the ion-laser (time dependent) interaction, continue with the problem of a slow atom interacting with a quantized field to end with a master equation that describes losses. In all cases it is shown that one may find useful transformations that simplify the problems.

quant-ph↗