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La información cuántica. Acoplamiento coherente de un solo espín a fotones de la cavidad de microondas

J J Viennot¹, M C Dartiailh², A Cottet²

¹Laboratoire Pierre Aigrain, Ecole Normale Supérieure-PSL Research University, CNRS, Université Pierre et Marie Curie-Sorbonne Universités, Université Paris Diderot-Sorbonne Paris Cité, 24 rue Lhomond, 75231 Paris Cedex 05, France. viennot@jila.colorado.edu kontos@lpa.ens.fr.

Science (New York, N.Y.)

|July 25, 2015

Resumen

Los investigadores acoplaron los giros de un solo electrón a los fotones utilizando una válvula de espín a nanoescala, lo que permite interacciones de espín-fotón en el rango de megahertz para el procesamiento de información cuántica. Este avance facilita la lectura de espín no destructiva y el acoplamiento de espín distante.

Área de la Ciencia:

Ciencia de la información cuántica
Física Mesoscópica
La óptica cuántica

Sus antecedentes:

Los espines de electrones y fotones son recursos cuánticos clave para el procesamiento de la información.
El acoplamiento coherente de espines individuales a fotones en resonadores superconductores es crucial para las tecnologías cuánticas.

Objetivo del estudio:

Para lograr una hibridación coherente de los estados de espín y carga en un doble punto cuántico.
Para demostrar el acoplamiento de un solo espín-fotón en el rango de megahertz.
Desarrollar un dispositivo mesoscópico para aplicaciones de información cuántica.

Principales métodos:

Utilizó un diseño de circuito basado en una válvula de giro a nanoescala.
Los estados de espín y carga individuales coherentemente hibridados de un doble punto cuántico.
Conservación de la coherencia de giro durante todo el proceso.

Principales resultados:

Logrado acoplamiento de fotones de espín hasta el rango de megahertz a nivel de un solo espín.
Demostró un valor de cooperatividad de 2,3.
Mantiene un tiempo de coherencia de espín de aproximadamente 60 nanosegundos.

Conclusiones:

Se demostró con éxito un dispositivo mesoscópico para la información cuántica.
El dispositivo permite una lectura de giro no destructiva.
El esquema desarrollado facilita el acoplamiento a distancia.

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