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Gradient Echo Quantum Memory in Warm Atomic Vapor

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QED de cavidad con un condensado Bose-Einstein.

Ferdinand Brennecke¹, Tobias Donner, Stephan Ritter

¹Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland.

|November 13, 2007

Resumen

Los investigadores lograron un fuerte acoplamiento entre un condensado de Bose-Einstein y una cavidad óptica. Este nuevo régimen en electrodinámica cuántica de cavidad (cavidad QED) permite la excitación compartida de fotones para aplicaciones cuánticas.

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Área de la Ciencia:

La física cuántica es la física cuántica.
La óptica cuántica es una óptica cuántica.
Física atómica es la física atómica.

Sus antecedentes:

La electrodinámica cuántica de cavidad (cavidad QED) explora las interacciones coherentes entre la materia y los campos electromagnéticos confinados.
Los resonadores de alta calidad permiten regímenes de acoplamiento fuertes para estudios cuánticos fundamentales.
El enfriamiento láser y el atrapamiento de átomos son cruciales para la ingeniería de estados cuánticos.

Objetivo del estudio:

Para lograr un fuerte acoplamiento entre un condensado de Bose-Einstein y una cavidad óptica de ultra-alta finura.
Para explorar un nuevo régimen de cavidad QED utilizando las propiedades únicas de los condensados de Bose-Einstein.
Para medir el espectro de energía propia del sistema acoplado.

Principales métodos:

Utilizando la condensación Bose-Einstein para el control atómico.
Empleando una cavidad óptica de ultra-alta precisión.
Lograr un fuerte acoplamiento entre el condensado y el campo cuantizado de la cavidad.

Principales resultados:

Demostró un fuerte acoplamiento de un condensado de Bose-Einstein a una cavidad óptica.
Se midió el espectro de energía propia de este nuevo sistema.
Estableció un régimen en el que todos los átomos comparten una única excitación de fotones.

Conclusiones:

Este trabajo establece un nuevo régimen conceptual de cavidad QED.
Los hallazgos abren posibilidades para la comunicación cuántica y la física de muchos cuerpos.
Abre el camino para explorar las interacciones mediadas por cavidades en gases cuánticos.