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Electromagnetic waves can travel in the vacuum as well as in matter. For example light, which is an electromagnetic wave, can travel through air, water, or glass.
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
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Electrodinámica cuántica guía de ondas con átomos gigantes artificiales superconductores

Bharath Kannan1,2, Max J Ruckriegel3, Daniel L Campbell3

  • 1Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA. bkannan@mit.edu.

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Área de la Ciencia:

  • La electrodinámica cuántica
  • Física del estado sólido
  • La óptica cuántica

Sus antecedentes:

  • La aproximación dipolo es estándar para las interacciones luz-materia, tratando los átomos como puntos.
  • Esta aproximación falla para los "átomos gigantes" donde el tamaño del átomo se acerca a la longitud de onda de la luz.
  • Los experimentos existentes con átomos gigantes usan qubits superconductores y sondas de una sola frecuencia.

Objetivo del estudio:

  • Para explorar una nueva arquitectura para la realización de átomos gigantes.
  • Para permitir acoplamientos sintonizables de guías de ondas atómicas y espectros de acoplamiento de ingeniería.
  • Para demostrar interacciones libres de decoherencia entre múltiples átomos gigantes.

Principales métodos:

  • Acoplamiento de pequeños átomos a una guía de ondas en múltiples ubicaciones discretas.
  • Utilizando una arquitectura alternativa más allá de los qubits superconductores.
  • Diseñar el diseño del dispositivo para controlar el espectro y las relaciones de acoplamiento.

Principales resultados:

  • Realizó con éxito átomos gigantes en una nueva arquitectura de estado sólido.
  • Se han logrado acoplamientos sintonizables de guía de ondas atómicas con grandes relaciones de encendido y apagado.
  • Interacciones demostradas sin decoherencia entre múltiples átomos gigantes a través de modos de guía de ondas.

Conclusiones:

  • Esta arquitectura de átomos gigantes supera las limitaciones de la aproximación del dipolo.
  • Permite el cambio in situ entre configuraciones de qubits protegidos y emisores.
  • Abre nuevas vías para las simulaciones cuánticas y la generación de fotones no clásicos.