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Magnon exprimiendo en el régimen cuántico.

Yuan-Chao Weng1, Da Xu2, Zhen Chen3

  • 1Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control, School of Physics, and State Key Laboratory for Extreme Photonics and Instrumentation, Zhejiang University, Hangzhou, China.

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Los investigadores observaron experimentalmente la compresión cuántica de magnones en una esfera macroscópica de granate de hierro de yttrio. Este avance en la magnónica cuántica no lineal allana el camino para las tecnologías cuánticas avanzadas y la metrología.

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Área de la Ciencia:

  • La física cuántica es la física cuántica.
  • 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 óptica cuántica es una óptica cuántica.

Sus antecedentes:

  • Los estados exprimidos son vitales para la metrología cuántica y las tecnologías cuánticas.
  • Demostrar la compresión cuántica en sistemas de espín macroscópicos, específicamente magnones, ha sido un desafío significativo.

Objetivo del estudio:

  • Para observar experimentalmente el magnon a nivel cuántico apretándose en una esfera de granate de hierro de yttrio (YIG) a escala milimétrica.
  • Para generar estados de Magnon apretados con un número de Magnon medio menor a uno.

Principales métodos:

  • Diseñó un fuerte acoplamiento de qubits dispersivos magnon-superconductores usando una cavidad de microondas.
  • Implementó una no linealidad de auto-Kerr para generar estados magnon exprimidos.
  • Utilizó un proceso Raman asistido por magnon para la tomografía de Wigner.

Principales resultados:

  • Se logró la observación experimental de magnon cuántico apretando en una esfera YIG.
  • Generó estados de magnon comprimidos con variaciones de cuadratura de aproximadamente 0.8 (~ 1.0 dB de compresión) por debajo del nivel de vacío.
  • Se ha demostrado que el promedio de los números de Magnon es menor que uno.

Conclusiones:

  • Estableció las bases para la magnónica cuántica no lineal.
  • Mostró aplicaciones potenciales en la metrología cuántica.
  • Abrió nuevas vías para explorar los fenómenos cuánticos en los sistemas de espín macroscópicos.