Dinámica de sistemas cuánticos abiertos: técnicas algebraicas para el modelo de Travis – Cummings
Keywords:
Decoherencia, Entreveramiento, Álgebra de Lie (es)Downloads
Se ilustra el uso de técnicas algebraicas para el cálculo de la evolución temporal de sistemas cuánticos abiertos, empleándola para la interacción de dos átomos idénticos con un modo del campo electromagnético sostenido por una cavidad de microondas con alto factor de calidad, en el régimen dispersivo. El efecto de las pérdidas en la cavidad se modela de manera efectiva mediante un superoperador disipativo, con la forma de Lindblad, correspondiente a temperatura cero. El defecto de pureza y la concurrencia atómica se encuentran para un estado inicial separable de átomos en el mismo estado y campo en un estado coherente.
The use of algebraic techniques to compute the time evolution of open quantum systems is illustrated in the case of two identical atoms interacting, in the dispersive regime, with a mode of the electromagnetic field held in a microwave cavity with high quality factor. The effect of the losses in the cavity is modelled by a dissipative superoperator, of Lindbladian form, corresponding to zero temperature. The purity defect and the atomic concurrence are found for an initial separable state of atoms in the same state and field in a coherent state.
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