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Transferencia coherente de pares de Cooper por un grano móvil
L Y Gorelik1, A Isacsson, Y M Galperin
1Department of Applied Physics, Chalmers University of Technology; and Göteborg University, SE-412 96 Göteborg, Sweden.
Nature
|May 25, 2001
Resumen
Teóricamente demostramos que una caja móvil de pares de Cooper puede mediar el acoplamiento de Josephson para la transferencia coherente de pares de Cooper entre electrodos superconductores. Los campos electrostáticos externos controlan la corriente de Josephson.
Área de la Ciencia:
- La computación cuántica es la computación cuántica.
- Física de la materia condensada Física de la materia condensada
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Los circuitos superconductores con uniones de Josephson son cruciales para la computación cuántica.
- Las cajas de pares de Cooper, granos superconductores de tamaño nanométrico, exhiben dos estados de carga dominantes.
- El acoplamiento del movimiento mecánico con la transferencia de carga en nanoestructuras es de gran interés.
Objetivo del estudio:
- Para demostrar teóricamente una caja Cooper-pareja móvil como un mediador de acoplamiento Josephson.
- Para mostrar la transferencia coherente de pares de Cooper entre electrodos superconductores.
- Para investigar el control de la corriente de Josephson a través de campos electrostáticos.
Principales métodos:
- Modelado teórico de un sistema de cajas Cooper-pair móvil.
- Análisis de las dinámicas de transferencia de pares de Cooper.
- Investigación de los efectos del campo electrostático en el acoplamiento de Josephson.
Principales resultados:
- Una caja Cooper-pair móvil puede mediar el acoplamiento Josephson.
- Es posible lograr una transferencia coherente de pares de Cooper entre electrodos superconductores.
- La magnitud y la dirección de la corriente de Josephson son controlables con campos electrostáticos.
Conclusiones:
- Las cajas móviles de pares Cooper ofrecen un nuevo mecanismo para la transferencia controlada de pares Cooper.
- Este sistema proporciona una plataforma sintonizable para el acoplamiento Josephson en circuitos superconductores.
- Aplicaciones potenciales en el procesamiento de información cuántica y en la electrónica superconductora.
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