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Demostración experimental de la memoria cuántica para la luz.

Brian Julsgaard1, Jacob Sherson, J Ignacio Cirac

  • 1Niels Bohr Institute, Danish Quantum Optics Center-QUANTOP, Copenhagen University, Blegdamsvej 17, 2100 Copenhagen Ø, Denmark.

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Los investigadores desarrollaron una memoria cuántica para la luz utilizando conjuntos atómicos. Esta memoria cuántica alcanza una fidelidad del 70%, superando los límites de grabación clásicos para el almacenamiento de información cuántica.

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Área de la Ciencia:

  • Ciencias de la información cuántica Ciencias de la información cuántica.
  • Física atómica es la física atómica.
  • La óptica es la óptica.

Sus antecedentes:

  • Los pulsos de luz son objetos cuánticos, lo que hace imposible la grabación clásica perfecta.
  • La transferencia de estados cuánticos de luz a la memoria atómica es un desafío de larga data en la información cuántica.

Objetivo del estudio:

  • Proponer y demostrar una memoria cuántica de alta fidelidad para la luz utilizando conjuntos atómicos.
  • Para superar las limitaciones de registro clásico para la transferencia de estado cuántico.

Principales métodos:

  • Utilizó átomos de cesio polarizados por espín para interactuar con pulsos de luz.
  • Empleó un campo de enredado y medición de la luz transmitida.
  • Implementó retroalimentación de pulso magnético de radiofrecuencia condicional aplicada a los átomos.

Principales resultados:

  • Logró una fidelidad del 70% en la grabación de estados cuánticos de luz en la memoria atómica.
  • Demostró una densidad de estados registrados 33% más alta en comparación con los métodos clásicos.
  • Se estableció una vida útil de memoria cuántica de hasta 4 milisegundos.

Conclusiones:

  • El protocolo propuesto permite el almacenamiento cuántico de alta fidelidad de la luz en conjuntos atómicos.
  • Este avance excede significativamente las capacidades clásicas de registro de información cuántica.
  • La memoria cuántica desarrollada es prometedora para futuras aplicaciones de comunicación cuántica y procesamiento de información.