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Destilación de entrelazamiento entre nodos de la red cuántica en estado sólido
N Kalb1,2, A A Reiserer1,2, P C Humphreys1,2
1QuTech, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands.
Science (New York, N.Y.)
|June 3, 2017
Resumen
Los investigadores mejoraron el entrelazamiento cuántico remoto utilizando operaciones locales en qubits electron-nucleares. Esta destilación de entrelazamiento mejora la fidelidad, crucial para el avance de las redes cuánticas y la exploración de entrelazamiento de partículas múltiples.
Área de la Ciencia:
- Ciencia de la información cuántica
- Las redes cuánticas
- La computación cuántica
Sus antecedentes:
- El entrelazamiento cuántico de alta calidad es esencial para las futuras redes cuánticas.
- Las imperfecciones en el entrelazamiento requieren métodos para mejorar los estados remotos a través de operaciones locales.
Objetivo del estudio:
- Para demostrar la destilación de entrelazamiento en una red cuántica primitiva.
- Para mejorar la fidelidad de los estados entrelazados remotos entre nodos distantes.
Principales métodos:
- Utilizó núcleos de dos qubits de electrones distantes.
- Se utiliza el enredo mediado por un solo fotón de los espines de los electrones.
- Implementado almacenamiento robusto en espines nucleares.
- Aplicación de puertas locales de dos qubits y mediciones de un solo disparo.
Principales resultados:
- Generó con éxito dos copias de un estado remoto entrelazado.
- Se ha conseguido una destilación por entrelazamiento, que da lugar a un estado entrelazado de mayor fidelidad.
- Demostró un proceso para mejorar la calidad del entrelazamiento remoto.
Conclusiones:
- La combinación de generación, almacenamiento y procesamiento de estados entrelazados es clave.
- Esta técnica permite la exploración del entrelazamiento de multipartículas en redes cuánticas extendidas.
- El estudio proporciona un primitivo vital para la construcción de redes cuánticas robustas.
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