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Circuito de electrodinámica cuántica con un qubit de espín.

K D Petersson1, L W McFaul, M D Schroer

  • 1Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.

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|October 19, 2012
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores integraron la electrodinámica cuántica del circuito integrado (cQED) con los qubits de espín de arseniuro de indio. Esto permite interacciones de qubit de largo alcance cruciales para la computación cuántica escalable y la dinámica de espín de sondeo.

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Área de la Ciencia:

  • La computación cuántica es la computación cuántica.
  • Física de la materia condensada Física de la materia condensada
  • Ciencias de la información cuántica Ciencias de la información cuántica.

Sus antecedentes:

  • Los giros de los electrones en los puntos cuánticos son prometedores para los procesadores cuánticos.
  • La computación cuántica escalable requiere interacciones de qubit de largo alcance más allá del acoplamiento de vecino más cercano.
  • La electrodinámica cuántica de circuito (cQED) facilita las interacciones entre qubits distantes a través de una cavidad superconductora.

Objetivo del estudio:

  • Para combinar la arquitectura cQED con spin qubits para la computación cuántica escalable.
  • Para investigar las interacciones de largo alcance entre los spin qubits utilizando una cavidad superconductora.
  • Para demostrar el uso de cQED como una sonda para la física de un solo giro.

Principales métodos:

  • Acoplamiento de un nanocable de arseniuro de indio con doble punto cuántico a una cavidad de microondas superconductora.
  • Utilizando la fuerte interacción espín-órbita en el arseniuro de indio para la rotación de espín eléctrico.
  • Empleando la interacción carga-cavidad para medir la dinámica de espín.

Principales resultados:

  • Se logró una tasa de acoplamiento carga-cavidad de aproximadamente 30 MHz.
  • Control eléctrico demostrado de las rotaciones de giro utilizando un electrodo de puerta local.
  • Mostró una tasa de acoplamiento de cavidad de espín factible de aproximadamente 1 MHz.

Conclusiones:

  • La arquitectura cQED se puede adaptar de manera efectiva para los spin qubits.
  • Este enfoque permite una exploración sensible de la física de un solo espín.
  • El acoplamiento de espín-cavidad demostrado allana el camino para las interacciones de espín de largo alcance en procesadores cuánticos.