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La información cuántica. Acoplamiento coherente entre un magnon ferromagnético y un qubit superconductor
Yutaka Tabuchi1, Seiichiro Ishino2, Atsushi Noguchi2
1Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Meguro-ku, Tokyo 153-8904, Japan. tabuchi@qc.rcast.u-tokyo.ac.jp.
Science (New York, N.Y.)
|July 11, 2015
Resumen
Los investigadores lograron un fuerte acoplamiento entre magnones individuales y qubits superconductores. Este método de control cuántico, utilizando cavidades de microondas, mejora las excitaciones de magnon para el procesamiento de información cuántica.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
- La ciencia de la información cuántica es una ciencia cuántica.
Sus antecedentes:
- Las fases ordenadas exhiben modos de excitación colectiva llamados magnones.
- Los magnones pueden extenderse a dimensiones macroscópicas, ofreciendo potencial para aplicaciones cuánticas.
Objetivo del estudio:
- Para demostrar el acoplamiento coherente entre magnones individuales y qubits superconductores.
- Para lograr un régimen de acoplamiento fuerte para un control cuántico mejorado.
Principales métodos:
- Utilizando una esfera ferromagnética de tamaño milimétrico para la excitación de magnon.
- Empleando un qubit superconductor y una cavidad de microondas para la mediación de la interacción.
- Implementación de un accionamiento paramétrico para el acoplamiento sintonizable magnon-qubit.
Principales resultados:
- Se logró un acoplamiento coherente entre un solo magnon y un qubit superconductor.
- Fuerza de acoplamiento demostrada que excede las tasas de amortiguación, entrando en el régimen de acoplamiento fuerte.
- Realizó un esquema de acoplamiento sintonizable a través de unidad paramétrica.
Conclusiones:
- El enfoque desarrollado permite un control cuántico versátil y la medición de magnones.
- Este trabajo avanza en los sistemas cuánticos híbridos para aplicaciones potenciales de procesamiento de información cuántica.
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