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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Subsistema sin mecánica cuántica con osciladores mecánicos

Laure Mercier de Lépinay1, Caspar F Ockeloen-Korppi1, Matthew J Woolley2

  • 1QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076 Aalto, Finland.

Science (New York, N.Y.)
|May 7, 2021
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Los investigadores desarrollaron un subsistema libre de mecánica cuántica utilizando dos osciladores micromecánicos para evitar la reacción cuántica durante la medición del oscilador. Este avance mejora la precisión para detectar fuerzas débiles y generar estados no clásicos.

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Área de la Ciencia:

  • La mecánica cuántica
  • La óptica cuántica
  • Optomecánica

Sus antecedentes:

  • La mecánica cuántica impone límites fundamentales a la precisión de las mediciones.
  • La medición continua de la posición de un oscilador está sujeta a una reacción cuántica.
  • La detección de fuerzas débiles y la generación de estados no clásicos son un desafío debido a estos límites.

Objetivo del estudio:

  • Para demostrar un método para medir un oscilador mientras se elude la reacción cuántica.
  • Realizar un subsistema libre de mecánica cuántica utilizando osciladores micromecánicos acoplados.
  • Verificar la eficacia de este subsistema para reducir el ruido de medición y confirmar el entrelazamiento cuántico.

Principales métodos:

  • Construcción de un oscilador efectivo a partir de dos osciladores físicos micromecánicos acoplados.
  • Ejecución de mediciones de cuadraturas colectivas del sistema acoplado.
  • Cuantificación de la evasión de reacción cuántica y el entrelazamiento usando la cantidad de Duan.

Principales resultados:

  • Se logró una medición libre de mecánica cuántica evitando la reacción cuántica en 8 decibelios en cuadraturas colectivas.
  • Ruido total obtenido dentro de un factor de 2 del límite cuántico completo.
  • El entrelazamiento cuántico verificado directamente entre los dos osciladores, con la cantidad de Duan 1.4 decibelios por debajo del límite de separabilidad.

Conclusiones:

  • El subsistema desarrollado sin mecánica cuántica reduce efectivamente la retroacción de la medición.
  • Esta técnica facilita la detección mejorada de fuerzas débiles y la generación/medida de estados de movimiento no clásicos.
  • El entrelazamiento cuántico verificado abre caminos para el procesamiento avanzado de información cuántica y la metrología.