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Generación determinista de un estado de racimo de fotones entrelazados
I Schwartz1, D Cogan1, E R Schmidgall2
1Physics Department and Solid State Institute, Technion-Israel Institute of Technology, 32000 Haifa, Israel.
Science (New York, N.Y.)
|September 10, 2016
Resumen
Los puntos cuánticos de semiconductores generan de manera determinista estados de racimo fotónico largo para la computación cuántica. Este método crea cientos de fotones entrelazados, avanzando en el procesamiento óptico de información cuántica.
Área de la Ciencia:
- Ciencia de la información cuántica
- Física del estado sólido
- La óptica cuántica
Sus antecedentes:
- Los estados de los cúmulos fotónicos son cruciales para la computación cuántica basada en mediciones.
- La generación determinista de fotones entrelazados es un desafío clave.
Objetivo del estudio:
- Generar de manera determinista largas cadenas de fotones enredados por polarización en un estado de racimo.
- Para utilizar puntos cuánticos de semiconductores para el procesamiento de información cuántica escalable.
Principales métodos:
- Excitación periódica cronometrada de un qubit de materia en proceso (excitón oscuro confinado) en puntos cuánticos de semiconductores.
- Adición secuencial de fotones entrelazados para construir el estado de grupo.
Principales resultados:
- Generación de cadenas de cientos de fotones con entrelazamiento persistente en cinco fotones secuenciales.
- Logró una fidelidad de mapa de proceso de 0,81 en comparación con un dispositivo ideal.
Conclusiones:
- Demostró un método viable para generar estados de racimo fotónico utilizando puntos cuánticos.
- Las mejoras factibles sugieren una reducción de los requisitos de recursos para el procesamiento óptico de información cuántica.
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