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Control coherente de la información óptica con la dinámica de las ondas de la materia
Naomi S Ginsberg1, Sean R Garner, Lene Vestergaard Hau
1Department of Physics, and Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|February 9, 2007
Resumen
Los científicos transfirieron información entre dos condensados de Bose-Einstein mediante la conversión de pulsos de luz en ondas de materia. Esta técnica de control cuántico almacena y revive pulsos ópticos utilizando la dinámica de onda de la materia atómica.
Área de la Ciencia:
- Óptica cuántica y física atómica.
- Exploración de las interacciones luz-materia en los condensados de Bose-Einstein.
Sus antecedentes:
- Avances significativos en la manipulación de la materia con la luz y viceversa.
- Las nubes atómicas frías y densas y los campos láser de resonancia ofrecen ricos sistemas para el estudio.
- La propagación ultra lenta de la luz en los condensados de Bose-Einstein (BEC) muestra una manipulación extrema de la luz.
Objetivo del estudio:
- Para demostrar el almacenamiento y la reactivación de un pulso de luz lento entre dos condensados de Bose-Einstein separados espacialmente.
- Para mostrar la transferencia de información a través de la conversión de un pulso óptico en una onda de materia en movimiento.
Principales métodos:
- Inyección y compresión espacial de un pulso láser de sonda en un BEC en presencia de un campo de acoplamiento.
- Conversión del pulso óptico en estados de superposición atómica (componentes estacionarios y de retroceso).
- Transferencia de la amplitud impresa y la información de fase a través de la onda de retroceso atómica "mensajera".
- Reanimación del pulso de luz de un segundo BEC mediante la re-iluminación con el láser de acoplamiento y la adición coherente del pulso mensajero.
Principales resultados:
- Almacenamiento exitoso y posterior reactivación de un pulso de luz lento de un BEC separado, a 160 μm de distancia.
- Demostración de la transferencia de información a través de la conversión de pulsos ópticos en ondas de materia en movimiento.
- El pulso de luz revivido registra con precisión la amplitud relativa y la fase de la huella atómica.
Conclusiones:
- Proporciona una demostración dramática del procesamiento de información óptica coherente utilizando la dinámica de las ondas de la materia.
- Destaca el potencial del control cuántico para aplicaciones en el procesamiento de información cuántica y la escultura de funciones de onda.
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