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To analyze a hydraulic jump in a rectangular channel with a flow speed of 6 meters per second, follow these steps:Calculate Effective Upstream Velocity:When the downstream gate closes, a hydraulic jump forms, traveling upstream at 2 meters per second. This wave speed combines with the initial channel flow velocity, creating an effective upstream velocity.Identify Flow Velocities Before and After the Hydraulic Jump:Upstream of the hydraulic jump, the effective flow velocity includes both the...
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Para atrapar y revertir un salto cuántico en pleno vuelo

Z K Minev1,2, S O Mundhada3, S Shankar3

  • 1Department of Applied Physics, Yale University, New Haven, CT, USA. zlatko.minev@aya.yale.edu.

Nature
|June 5, 2019
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores ahora pueden predecir y controlar saltos cuánticos en átomos superconductores. Al monitorear un nivel de energía auxiliar, pueden rastrear el salto

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Área de la Ciencia:

  • Física Cuántica
  • Física atómica
  • La óptica cuántica

Sus antecedentes:

  • Las mediciones cuánticas producen resultados discretos y aleatorios, ejemplificados por saltos cuánticos entre niveles de energía atómica.
  • Los saltos cuánticos se observaron experimentalmente en iones atómicos bajo condiciones de medición específicas.
  • El momento de los saltos cuánticos ha sido considerado fundamentalmente impredecible.

Objetivo del estudio:

  • Investigar si los saltos cuánticos, a pesar de su naturaleza no determinista, pueden predecirse.
  • Para demostrar experimentalmente la posibilidad de rastrear e intervenir en saltos cuánticos.
  • Para explorar técnicas de control en tiempo real para sistemas cuánticos.

Principales métodos:

  • Seguimiento experimental de saltos cuánticos en un átomo superconductor artificial de tres niveles.
  • Monitoreo de la población de un nivel de energía auxiliar acoplado al estado fundamental.
  • Utilizando monitoreo y retroalimentación en tiempo real para intervenir en saltos cuánticos a mitad de vuelo.

Principales resultados:

  • Demostró que los saltos cuánticos siguen una trayectoria de 'vuelo' predecible.
  • Demostró que la evolución de los saltos cuánticos completados es continua, coherente y determinista.
  • Capturó y revirtió con éxito saltos cuánticos a mitad de vuelo usando retroalimentación en tiempo real.

Conclusiones:

  • Los saltos cuánticos se pueden predecir y controlar en tiempo real.
  • Los hallazgos apoyan la teoría de la trayectoria cuántica moderna y sus predicciones.
  • Abre nuevas vías para la intervención en tiempo real en sistemas cuánticos, incluida la corrección de errores cuánticos.