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Operaciones cuánticas universales y lectura basada en ancilla para relojes de pinza
Ran Finkelstein1, Richard Bing-Shiun Tsai1, Xiangkai Sun1
1California Institute of Technology, Pasadena, CA, USA.
Nature
|October 9, 2024
Resumen
Los investigadores demuestran operaciones cuánticas universales para relojes ópticos de átomos neutros, lo que permite una mayor precisión en la metrología cuántica. Este avance allana el camino para sensores cuánticos prácticos y dispositivos cuánticos híbridos.
Área de la Ciencia:
- Ciencia de la información cuántica
- Física atómica
- Metrología
Sus antecedentes:
- Aprovechar el entrelazamiento cuántico es crucial para avanzar en la metrología cuántica y lograr una mayor precisión de medición.
- Los relojes ópticos neutro-atómicos son los principales sistemas de cronometraje, pero carecen del control necesario para esquemas avanzados de entrelazamiento.
- Superar el ruido para alcanzar los límites teóricos de sensibilidad requiere estrategias óptimas de generación y lectura del estado de la sonda.
Objetivo del estudio:
- Para demostrar las operaciones cuánticas universales y la lectura basada en ancilla para relojes ópticos de átomos neutros.
- Permitir un enfoque basado en circuitos para la metrología cuántica utilizando relojes ópticos de átomos neutros.
- Establecer las bases para dispositivos cuánticos híbridos que integran procesadores y sensores.
Principales métodos:
- Implementó puertas de entrelazamiento de dos qubits con alta fidelidad (99,62%) utilizando interacciones de Rydberg y conectividad dinámica.
- Utilizó direccionamiento local para circuitos cuánticos universalmente programables en una plataforma de reloj de pinza.
- Se utiliza espectroscopia de lógica cuántica basada en ancilla para la detección rápida y repetida de fases con un restablecimiento de qubits no destructivo.
Principales resultados:
- Generó estados de sonda entrelazados casi óptimos, incluidos los estados de Greenberger-Horne-Zeilinger de varios tamaños.
- Se ha realizado una lectura de doble cuadratura Greenberger-Horne-Zeilinger.
- Se logró un tiempo muerto mínimo entre mediciones repetidas a través del restablecimiento condicional de qubits.
Conclusiones:
- Las operaciones cuánticas universales demostradas y las estrategias de lectura son fundamentales para el avance de los relojes ópticos de átomos neutros en la metrología cuántica.
- Este trabajo permite aplicaciones prácticas de procesadores cuánticos vinculados con sensores cuánticos.
- Abre nuevas vías para dispositivos híbridos de procesador-reloj que utilizan átomos neutros.
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