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Caracterización simetrizada de los procesos cuánticos ruidosos
Joseph Emerson1, Marcus Silva, Osama Moussa
1Department of Applied Math, University of Waterloo, Waterloo, ON N2L 3G1, Canada.
Science (New York, N.Y.)
|September 29, 2007
Resumen
Desarrollamos una técnica de simetrización para medir la decoherencia cuántica, superando las limitaciones en el control de sistemas cuánticos de muchos cuerpos. Este método reduce significativamente la complejidad experimental para aplicaciones de computación cuántica.
Área de la Ciencia:
- Ciencias de la información cuántica Ciencias de la información cuántica.
- La computación cuántica es la computación cuántica.
- Física de la materia condensada Física de la materia condensada
Sus antecedentes:
- El control de alta precisión de los sistemas cuánticos de muchos cuerpos es crucial para la computación cuántica.
- Los sistemas cuánticos son muy susceptibles a la decoherencia por el ruido ambiental y las imperfecciones de control.
- Los métodos actuales de caracterización de ruido son computacionalmente inviables para grandes sistemas cuánticos.
Objetivo del estudio:
- Introducir una nueva técnica para medir experimentalmente las propiedades de decoherencia en sistemas cuánticos.
- Para superar la intratabilidad de los métodos de caracterización de ruido existentes para sistemas multicorpo.
- Para permitir un control más robusto y el desarrollo de computadoras cuánticas.
Principales métodos:
- Una técnica basada en la simetrización para la medición experimental directa de la decoherencia.
- Reducir el número de experimentos requeridos de escala exponencial a escala polinomial con el número de subsistemas.
- Demostración sobre la optimización del control de los espines nucleares en sistemas de estado sólido.
Principales resultados:
- Medición experimental exitosa de las principales propiedades de decoherencia.
- Reducción significativa de los gastos generales experimentales en comparación con los métodos existentes.
- Validación de la técnica para aplicaciones prácticas en el control cuántico.
Conclusiones:
- La técnica de simetrización proporciona un enfoque eficiente y escalable para caracterizar la decoherencia.
- Este método facilita el desarrollo de un control de alta precisión para la computación cuántica.
- La técnica es aplicable al procesamiento de información cuántica en estado sólido.
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