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Teletransportación cuántica determinista con alimentación hacia adelante en un sistema de estado sólido.

L Steffen1, Y Salathe, M Oppliger

  • 1Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland. lsteffen@phys.ethz.ch

Nature
|August 20, 2013
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores demuestran la teletransportación cuántica determinista utilizando circuitos superconductores. Este avance en la ciencia de la información cuántica permite la transferencia de estados de alta fidelidad entre sistemas cuánticos macroscópicos, allanando el camino para las redes de comunicación cuántica.

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Área de la Ciencia:

  • Ciencias de la información cuántica Ciencias de la información cuántica.
  • Circuitos superconductores en circuitos superconductores.
  • La computación cuántica es la computación cuántica.

Sus antecedentes:

  • Los sistemas cuánticos macroscópicos que utilizan circuitos superconductores son clave para la ciencia de la información cuántica.
  • Los sistemas actuales permiten puertas lógicas básicas, estados entrelazados y corrección de errores.
  • La lectura de un solo qubit de alta fidelidad es esencial para el control de retroalimentación.

Objetivo del estudio:

  • Para realizar la teletransportación cuántica determinista completa con alimentación hacia adelante en un circuito superconductor basado en chips.
  • Para utilizar técnicas avanzadas de lectura y electrónica digital flexible para un control preciso.
  • Explorar el potencial de la tecnología de bus cuántico cruzado para arquitecturas de circuitos complejos.

Principales métodos:

  • Empleó un conjunto de dos amplificadores paramétricos para la lectura conjunta e individual de qubit de un solo disparo.
  • Electrónica digital flexible y en tiempo real integrada para el control.
  • Utilizó la tecnología de bus cuántico cruzado para la arquitectura de circuito planar con conectividad arbitraria.

Principales resultados:

  • Se logró la teletransportación cuántica determinista completa con alimentación hacia adelante en un circuito superconductor.
  • Se ha demostrado la teletransportación de alta fidelidad de los estados cuánticos entre sistemas macroscópicos (6 mm de distancia) a una velocidad de 10^4 s^-1.
  • El proceso tuvo éxito con una probabilidad cercana a la unidad para cualquier estado de entrada.

Conclusiones:

  • El esquema de teletransportación cuántica demostrado es altamente eficiente y escalable.
  • Las guías de onda superconductoras ofrecen bajas pérdidas de transmisión, lo que permite la comunicación cuántica de mayor distancia.
  • La técnica de alimentación hacia adelante es prometedora para aplicaciones de corrección de errores cuánticos.