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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
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Una interfaz de espín-fotón coherente en silicio
1Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
Nature
|February 15, 2018
Resumen
Los investigadores lograron un fuerte acoplamiento entre los espines de los electrones de silicio y los fotones de microondas, lo que permite conexiones cuánticas de larga distancia. Este avance facilita la computación cuántica al permitir una conectividad escalable de todos a todos los qubits a través de fotones.
Área de la Ciencia:
- La computación cuántica
- Ciencia de la información cuántica
- Física del estado sólido
Sus antecedentes:
- Los puntos cuánticos de silicio ofrecen largos tiempos de coherencia y escalabilidad para la computación cuántica.
- Los métodos actuales como el acoplamiento del vecino más cercano limitan la conectividad de qubits.
- Lograr el acoplamiento de espín-espín de larga distancia a través de fotones es crucial para los procesadores cuánticos avanzados.
Objetivo del estudio:
- Para demostrar un fuerte y coherente acoplamiento entre los espines de un solo electrón en el silicio y los fotones de frecuencia de microondas.
- Para superar las limitaciones de los pequeños momentos de dipolo magnético para las interacciones espín-fotón.
- Para permitir la conectividad de todos a todos en procesadores cuánticos basados en spin.
Principales métodos:
- Utilizando la hibridación de carga de espín en un gradiente de campo magnético para mejorar la interacción de espín-fotón.
- Utilizando fotones de frecuencia de microondas para mediar el acoplamiento espín-espín.
- Implementación de técnicas de control coherente y de lectura dispersiva para giros individuales.
Principales resultados:
- Se han logrado fuertes velocidades de acoplamiento de espín-fotón superiores a 10 megahertz, significativamente más altas que los métodos anteriores.
- Se ha demostrado el control coherente y la lectura dispersiva de los espines individuales de los electrones en el silicio.
- Estableció un mecanismo viable para mediar las interacciones entre giros distantes.
Conclusiones:
- El fuerte acoplamiento de espín-fotón demostrado proporciona una vía directa para enredar espines individuales utilizando fotones.
- Esta investigación allana el camino para procesadores cuánticos escalables con conectividad entre todos los qubits.
- Los avances en la tecnología de puntos cuánticos de silicio se aceleran, acercando la computación cuántica práctica.
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