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Procesador cuántico lógico basado en matrices de átomos reconfigurables

Dolev Bluvstein1, Simon J Evered1, Alexandra A Geim1

  • 1Department of Physics, Harvard University, Cambridge, MA, USA.

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|December 6, 2023
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un procesador cuántico programable utilizando qubits lógicos codificados, mejorando significativamente la corrección de errores cuánticos. Este avance supera los desafíos clave en la computación cuántica a gran escala al mejorar las fidelidades de la puerta y el rendimiento algorítmico.

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Área de la Ciencia:

  • Ciencia de la información cuántica
  • La computación cuántica
  • Corrección de errores cuánticos

Sus antecedentes:

  • La supresión de errores es crítica para la computación cuántica útil, lo que requiere la corrección de errores cuánticos (QEC).
  • La sobrecarga de los qubits lógicos corregidos por errores presenta un obstáculo importante para la computación cuántica a gran escala.
  • Los procesadores cuánticos existentes se enfrentan a desafíos para lograr una alta fidelidad y escalabilidad para QEC.

Objetivo del estudio:

  • Realizar un procesador cuántico programable que utilice qubits lógicos codificados.
  • Para demostrar mejoras en las capacidades de corrección de errores cuánticos y rendimiento algorítmico.
  • Para superar los desafíos generales asociados con la realización de qubits lógicos.

Principales métodos:

  • Desarrollo de un procesador cuántico programable con hasta 280 qubits físicos utilizando matrices de átomos neutros.
  • Implementación de control a nivel lógico, arquitectura zonada y conectividad arbitraria.
  • Utilización de varios esquemas de codificación, incluidos códigos de superficie y códigos de color, para la corrección de errores.

Principales resultados:

  • Mejora demostrada en la fidelidad de la puerta de dos qubits al escalar la distancia del código de superficie.
  • Logró fidelidades de equilibrio para los qubits de código de color y la creación tolerante a fallos de estados lógicos GHZ.
  • Ejecutó con éxito circuitos de muestreo complejos con hasta 48 qubits lógicos, superando la fidelidad de los qubits físicos.

Conclusiones:

  • El procesador cuántico lógico desarrollado mejora significativamente el rendimiento algorítmico con la detección de errores.
  • Este trabajo marca un paso significativo hacia la computación cuántica temprana con corrección de errores.
  • Los hallazgos proporcionan un camino claro para el desarrollo de procesadores cuánticos lógicos a gran escala.