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Implementación de la arquitectura cuántica von Neumann con circuitos superconductores.

Matteo Mariantoni1, H Wang, T Yamamoto

  • 1Department of Physics, University of California, Santa Barbara, CA 93106-9530, USA. matmar@physics.ucsb.edu

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Los investigadores desarrollaron una unidad de procesamiento central cuántica (CPU) con memoria cuántica integrada. Esta máquina cuántica ejecuta algoritmos como la transformada cuántica de Fourier, allanando el camino para las aplicaciones de computación cuántica.

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Área de la Ciencia:

  • La computación cuántica es la computación cuántica.
  • Arquitectura de las computadoras Arquitectura de las computadoras.

Sus antecedentes:

  • Las computadoras clásicas utilizan la arquitectura von Neumann con una unidad central de procesamiento y memoria.
  • La computación cuántica requiere nuevas arquitecturas para el procesamiento y almacenamiento de datos.

Objetivo del estudio:

  • Para demostrar una unidad de procesamiento central cuántica (CPU) integrada con memoria cuántica de acceso aleatorio (qRAM) en un solo chip.
  • Para probar la capacidad de la CPU cuántica para ejecutar algoritmos cuánticos utilizando qubits superconductores.

Principales métodos:

  • Desarrolló una arquitectura de CPU cuántica que intercambia datos con una qRAM en el chip.
  • Utilizó dos qubits superconductores, un bus cuántico, dos memorias cuánticas y dos registros de cero.
  • Ejecutó algoritmos cuánticos con instrucciones almacenadas en una computadora clásica.

Principales resultados:

  • Se logró una fidelidad de proceso del 66% para el algoritmo de transformación cuántica de Fourier.
  • Se ha demostrado una fidelidad de fase del 98% para una puerta de fase OR de clase Toffoli de tres qubits.
  • Ejecutó con éxito códigos cuánticos que involucran siete elementos cuánticos.

Conclusiones:

  • La arquitectura cuántica demostrada ofrece un enfoque viable para futuras computadoras cuánticas.
  • Los resultados sugieren potencial para el factoring numérico y la implementación de códigos de corrección de error cuántico.
  • Se espera que las mejoras adicionales en la coherencia de qubits mejoren el rendimiento.