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Un qubit de espín de electrones de un solo átomo en silicio.

Jarryd J Pla1, Kuan Y Tan, Juan P Dehollain

  • 1Centre for Quantum Computation and Communication Technology, School of Electrical Engineering & Telecommunications, University of New South Wales, Sydney, New South Wales 2052, Australia. jarryd@unsw.edu.au

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Resumen
Este resumen es generado por máquina.

Los investigadores demuestran la manipulación coherente de un qubit de espín de electrones individuales en el silicio. Este avance en la computación cuántica utiliza un solo átomo de fósforo, allanando el camino para procesadores cuánticos escalables.

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Área de la Ciencia:

  • La computación cuántica es la computación cuántica.
  • Física atómica es la física atómica.
  • Física del estado sólido Física del estado sólido

Sus antecedentes:

  • Los átomos individuales son sistemas cuánticos ideales para los bits cuánticos (qubits).
  • Las implementaciones anteriores de qubits incluyen trampas electromagnéticas y centros de vacío de nitrógeno en diamantes.
  • El escalamiento de los procesadores cuánticos requiere la integración de qubits atómicos con dispositivos eléctricos.

Objetivo del estudio:

  • Para demostrar la manipulación coherente de un qubit de espín de electrones individuales unido a un átomo de fósforo en el silicio.
  • Para lograr una lectura eléctrica del estado del qubit.
  • Para evaluar el potencial de las arquitecturas escalables de computación cuántica.

Principales métodos:

  • Utilizó la resonancia de espín de electrones (ESR) para impulsar las oscilaciones de Rabi.
  • Empleó una secuencia de pulsos de eco de Hahn para medir el tiempo de coherencia de espín.
  • Desarrolló una arquitectura de dispositivo compatible con la tecnología de circuitos integrados para lecturas eléctricas.

Principales resultados:

  • Manipulación coherente demostrada de un qubit de espín de un solo electrón en silicio natural.
  • Se logró una lectura eléctrica de un solo disparo del qubit.
  • Se midió un tiempo de coherencia de espín superior a 200 microsegundos, con potencial para tiempos más largos en silicio enriquecido.

Conclusiones:

  • El espín del electrón de un solo átomo de fósforo en el silicio es una plataforma prometedora para la computación cuántica escalable.
  • La medición eléctrica y el control coherente se han combinado con éxito.
  • Este enfoque ofrece compatibilidad con la tecnología de circuitos integrados existente.