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Las correlaciones de un solo disparo y la puerta de dos qubits de los giros del estado sólido.
K C Nowack1, M Shafiei, M Laforest
1Kavli Institute of Nanoscience, Delft University of Technology, Post Office Box 5046, 2600 GA Delft, Netherlands. k.c.nowack@tudelft.nl
Science (New York, N.Y.)
|August 6, 2011
Resumen
Logramos una lectura independiente de un solo disparo de dos espines de electrones en un punto cuántico doble, lo que permite una caracterización eficiente de circuitos cuánticos multiqubit. Este avance en el procesamiento de información cuántica demuestra operaciones de puerta de dos qubits de alta fidelidad.
Área de la Ciencia:
- La Ciencia de la Información Cuántica es la Ciencia de la Información Cuántica.
- Física de la materia condensada Física de la materia condensada
- La computación cuántica es la computación cuántica.
Sus antecedentes:
- La medición precisa de los sistemas cuánticos acoplados es esencial para avanzar en el procesamiento de la información cuántica.
- Desarrollar un control escalable y de alta fidelidad de bits cuánticos (qubits) es un desafío clave en la construcción de computadoras cuánticas.
Objetivo del estudio:
- Demostrar una lectura independiente de un solo disparo de dos espines de electrones en un doble punto cuántico.
- Para permitir la exploración directa de las correlaciones de espín y el funcionamiento de las puertas de dos qubits.
- Proporcionar una vía para la caracterización eficiente de circuitos cuánticos multiqubit.
Principales métodos:
- Utilizó un método de lectura totalmente eléctrico para dos espines de electrones confinados en un doble punto cuántico.
- Se logró una negligible conversación cruzada entre las mediciones de giro individuales.
- Realizó una lectura de un solo disparo con fidelidades promedio de aproximadamente 86%.
Principales resultados:
- Realizó con éxito una lectura independiente de un solo disparo de dos espines de electrones distintos.
- Se demostró un intercambio de mediciones insignificante, lo que garantiza la integridad de la información de giro individual.
- Logró altas fidelidades de lectura promedio, lo que facilita una caracterización confiable del estado cuántico.
Conclusiones:
- La técnica de lectura totalmente eléctrica desarrollada es altamente efectiva para medir los espines de los electrones acoplados.
- Este método facilita la observación directa de las correlaciones de espín y la demostración de operaciones de puerta de dos qubits.
- Los resultados allanan el camino para la realización y caracterización eficiente de circuitos cuánticos multiqubit escalables.
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