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Detección cuántica con resolución de frecuencia arbitraria

J M Boss1, K S Cujia1, J Zopes1

  • 1Department of Physics, ETH Zurich, Otto Stern Weg 1, 8093 Zurich, Switzerland.

Science (New York, N.Y.)
|May 27, 2017
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron una técnica de detección cuántica con una resolución de frecuencia sin precedentes, que permite la detección altamente sensible de campos magnéticos oscilantes. Este avance utiliza la detección de bloqueo cuántico para aplicaciones en espectroscopia y simulación cuántica.

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Área de la Ciencia:

  • Tecnologías cuánticas
  • La detección cuántica
  • Medición de precisión

Sus antecedentes:

  • La detección cuántica utiliza sistemas cuánticos controlados para mediciones altamente sensibles y precisas.
  • Los métodos existentes a menudo tienen limitaciones en la resolución de frecuencia vinculada a la sonda de qubit.

Objetivo del estudio:

  • Implementar un nuevo concepto de detección cuántica con una resolución de frecuencia arbitraria.
  • Para lograr una alta sensibilidad y precisión en la detección de señales oscilantes.

Principales métodos:

  • Utilizó la detección de bloqueo cuántico para la detección continua de señales.
  • Empleado el espín electrónico de un solo centro de vacío de nitrógeno en diamante como la sonda cuántica.
  • Detección demostrada de campos magnéticos oscilantes.

Principales resultados:

  • Logró una resolución de frecuencia de 70 microhertz sobre un ancho de banda de megahertz.
  • Se ha demostrado una mayor sensibilidad con una relación señal/ruido superior a 10^4 para una señal de prueba de 170 nT durante 1 hora.
  • Mostró la independencia de la resolución de frecuencia de la sonda de qubit, limitada solo por un reloj externo.

Conclusiones:

  • La técnica de detección cuántica implementada ofrece una resolución y sensibilidad de frecuencia superiores.
  • Este método tiene un potencial significativo para aplicaciones en espectroscopia de resonancia magnética, simulación cuántica y detección avanzada de señales.