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El almacenamiento cuántico del entrelazamiento fotónico en un cristal
Christoph Clausen1, Imam Usmani, Félix Bussières
1Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland.
Nature
|January 14, 2011
Resumen
Los científicos lograron el entrelazamiento cuántico entre un fotón y un cristal.
Área de la Ciencia:
- La física cuántica es la física cuántica.
- Ciencias de la información cuántica Ciencias de la información cuántica.
Sus antecedentes:
- El entrelazamiento es un principio básico de la física cuántica.
- El entrelazamiento entre la luz y la materia es crucial para las tecnologías cuánticas como los repetidores y redes cuánticas.
Objetivo del estudio:
- Para demostrar el entrelazamiento entre un fotón y un cristal.
- Para avanzar en las tecnologías de comunicación cuántica.
Principales métodos:
- Se generaron pares de fotones entrelazados.
- Un fotón fue almacenado en un cristal, mientras que el otro viajó a través de la fibra.
- Se puso a prueba la desigualdad Clauser-Horne-Shimony-Holt.
Principales resultados:
- Se demostró con éxito el entrelazamiento entre un fotón de 1,338 nm y la excitación atómica en un cristal.
- Una violación de la desigualdad de Clauser-Horne-Shimony-Holt (S = 2.64 ± 0.23) confirmó el almacenamiento de entrelazamiento.
- El fotón almacenado fue liberado en un modo espacial bien definido.
Conclusiones:
- Este trabajo es un paso significativo hacia la comunicación cuántica de estado sólido.
- Los métodos desarrollados permiten la creación de repetidores cuánticos multiplexados para redes cuánticas de larga distancia.
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