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Área de la Ciencia:

  • La computación cuántica es la computación cuántica.
  • Corrección de errores cuánticos Corrección de errores cuánticos
  • Circuitos superconductores en circuitos superconductores.

Sus antecedentes:

  • Las computadoras cuánticas ofrecen aceleraciones exponenciales, pero son propensas a errores.
  • Los códigos de corrección de errores cuánticos son esenciales para mantener la coherencia cuántica.
  • Los códigos de tres qubits son la forma más simple, codifican un qubit en tres.

Objetivo del estudio:

  • Para demostrar los códigos de corrección de errores de fase y bit-flip en un circuito superconductor.
  • Para implementar una puerta de tres qubits para la corrección de errores.
  • Para mostrar una insensibilidad de primer orden a los errores.

Principales métodos:

  • Codificación de un estado cuántico en un estado entrelazado de tres qubits.
  • La inducción de errores de un solo qubit (bit-flip y fase-flip).
  • Decodificar el síndrome de error y aplicar una puerta correctiva de tres qubits (puerta Toffoli).

Principales resultados:

  • Logró 85±1% de fidelidad para la acción clásica de la puerta Toffoli.
  • Se logró una fidelidad de 78±1% para la matriz de proceso cuántico ideal.
  • Insensibilidad demostrada de primer orden a los errores, como se predijo.

Conclusiones:

  • Los códigos de tres qubits implementados corregen efectivamente los errores de un solo qubit.
  • Este enfoque es prometedor para la tecnología cuántica escalable cuando se combina con tiempos de coherencia mejorados.
  • La concatenación de códigos en un dispositivo de nueve qubits podría corregir errores arbitrarios de un solo qubit.