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Purificación experimental del entrelazamiento de dos átomos
R Reichle1, D Leibfried, E Knill
1National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Nature
|October 20, 2006
Resumen
Los investigadores desarrollaron un protocolo de purificación de entrelazamiento cuántico eficiente y no destructivo. Este método utiliza qubits atómicos para destilar pares entrelazados de alta fidelidad, mejorando las capacidades de procesamiento de información cuántica.
Área de la Ciencia:
- Ciencias de la información cuántica Ciencias de la información cuántica.
- La computación cuántica es la computación cuántica.
- La Comunicación Cuántica es una comunicación cuántica.
Sus antecedentes:
- El entrelazamiento es crucial para aplicaciones cuánticas como la comunicación privada y la teletransportación cuántica.
- El transporte de partículas entrelazadas degrada la fidelidad del entrelazamiento debido a la decoherencia.
- Los protocolos de purificación de entrelazamiento existentes a menudo son ineficientes y destructivos.
Objetivo del estudio:
- Desarrollar un protocolo de purificación de entrelazamiento eficiente y no destructivo.
- Para mejorar la fidelidad de los bits cuánticos entrelazados distribuidos (qubits).
- Para permitir aplicaciones prácticas de procesamiento de información cuántica.
Principales métodos:
- Utilizados bits cuánticos atómicos (qubits) para la purificación del entrelazamiento.
- Implementó un protocolo que involucra operaciones cuánticas separadas y comunicación clásica.
- Destilado dos ruidosos pares entrelazados en un solo par de mayor fidelidad.
Principales resultados:
- Se logra una purificación de entrelazamiento eficiente y no destructiva.
- Se obtienen pares entrelazados destilados con probabilidades de éxito superiores al 35%.
- Los pares destilados asegurados permanecen disponibles para un posterior procesamiento cuántico.
Conclusiones:
- El protocolo desarrollado ofrece un avance significativo con respecto a los métodos anteriores.
- La purificación eficiente y no destructiva del entrelazamiento ahora es factible con qubits atómicos.
- Esta técnica es vital para el avance de la comunicación y la computación cuántica.
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