Estudo das técnicas de obtenção de Hamiltonianos efetivos em Óptica Quântica

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

In the Quantum Optics area, the construction of effective hamiltonian is a matter of great importance, since from them we can generate and manipulate quantum states and logical operations. In this work we discuss 3 approximate methods for obtaining such effective hamiltonians: i) adiabatic elimination, ii) method of effective dynamics for oscillating hamiltonians and iii) nonlinear small rotations. Here we analyze the regime of validity of these techniques, their disadvantages and advantages. We note that, although adiabatic elimination is the most used and known, it has inconsistencies and can provide incorrect effective hamiltonians. The method of effective dynamics, although a very simple technique, also has inconsistencies and is not applicable to dissipative systems. Moreover, the method of nonlinear small rotations, which appears as the most accurate, is rarely used in the literature.

ASSUNTO(S)

Óptica quântica effective hamiltonians métodos aproximativos em Óptica quâtica hamiltonianos efetivos approximate methods in quantum optics engenharia de estados quânticos engineering of quantum states mecânica quântica fisica

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