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Updated: May 15, 2026

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
La retroacción cuántica de una medición de fuerza variable individual
M Hatridge1, S Shankar, M Mirrahimi
1Department of Applied Physics and Physics, Yale University, New Haven, CT 06520, USA. michael.hatridge@yale.edu
Resumen
Los investigadores han rastreado con precisión un qubit superconductor.
Área de la Ciencia:
- La física cuántica es la física cuántica.
- La ciencia de la información cuántica es una ciencia cuántica.
- Circuitos superconductores en los circuitos superconductores.
Sus antecedentes:
- Las mediciones cuánticas pueden perturbar los sistemas cuánticos.
- El impacto de la retroacción de la medición depende de la propiedad medida.
- Las mediciones parciales ideales deben preservar la pureza del sistema.
Objetivo del estudio:
- Para verificar experimentalmente el comportamiento predicho de los sistemas cuánticos bajo medición parcial ideal.
- Para demostrar un monitoreo preciso del estado cuántico para el control de retroalimentación.
Principales métodos:
- Utilizó un qubit superconductor acoplado dispersivamente a una cavidad de microondas.
- Realizó una sola medición de ambas cuadraturas de la señal.
- Observó y caracterizó la retroacción de la medición en el estado del qubit.
Principales resultados:
- Demostró que el qubit se mantuvo en un estado puro después de la medición parcial.
- Observado retroacción estocástica en el qubit, dependiendo del resultado de la medición.
- Mostró la capacidad de rastrear la evolución del qubit utilizando el registro de medición.
Conclusiones:
- Validación experimental de las predicciones de la teoría cuántica para mediciones parciales.
- Se puede lograr un monitoreo preciso del estado cuántico.
- Paso esencial hacia el control de retroalimentación basado en mediciones en sistemas cuánticos.
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