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Superradiancia coherente de un solo átomo

Junki Kim1, Daeho Yang1, Seung-Hoon Oh1

  • 1Department of Physics and Astronomy and Institute of Applied Physics, Seoul National University, Seoul 08826, Republic of Korea.

Science (New York, N.Y.)
|December 23, 2017
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores lograron una superradiancia coherente de un solo átomo mediada por la cavidad enviando átomos individuales correlacionados a través de una cavidad uno por uno. Se observó una fotoemisión colectiva mejorada, que muestra una dependencia N-cuadrada, incluso con menos de un átomo en la cavidad.

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Área de la Ciencia:

  • La óptica cuántica
  • Física atómica
  • La electrodinámica cuántica de la cavidad

Sus antecedentes:

  • La superradiancia es un fenómeno cuántico que involucra la emisión cooperativa de fotones de átomos correlacionados en sistemas macroscópicos.
  • Las interacciones de campo atómico colectivo controlado son cruciales para aprovechar la superradiancia, a menudo lograda imprimiendo correlaciones dentro de conjuntos atómicos.

Objetivo del estudio:

  • Para demostrar la superradiancia coherente de un solo átomo mediada por la cavidad.
  • Investigar la emisión cooperativa de fotones de átomos individuales que interactúan con átomos preexistentes dentro de una cavidad.
  • Establecer una plataforma para las interacciones de campo atómico controladas por fase.

Principales métodos:

  • Los átomos individuales con correlaciones predefinidas fueron enviados secuencialmente a través de una cavidad óptica de factor de alta calidad.
  • El control de posición de precisión nanométrica y la manipulación del estado alineado de los átomos se lograron utilizando una abertura de matriz de nanoagujero.
  • La emisión cooperativa se midió observando la emisión de fotones sincronizada con el conjunto atómico intracavitario.

Principales resultados:

  • Se demostró con éxito la superradiancia coherente de un solo átomo mediada por la cavidad.
  • Se observó una fotoemisión colectiva mejorada con una dependencia N-cuadrado, incluso cuando el número promedio de átomos intracavitarios era menor que unidad.
  • Los resultados confirman la emisión cooperativa de átomos individuales que interactúan con un conjunto preestablecido.

Conclusiones:

  • El estudio presenta un nuevo método para lograr superradiancia mediante inyecciones secuenciales de un solo átomo en una cavidad óptica.
  • Este trabajo proporciona una plataforma robusta para interacciones de campo atómico con control de fase preciso.
  • El escalamiento N-cuadrado observado destaca el potencial de fenómenos cuánticos escalables con átomos controlados individualmente.