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The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

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. Schrödinger...
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Gradient Echo Quantum Memory in Warm Atomic Vapor
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Published on: November 12, 2013

Suppressing normal mode excitation by quantum interference in a cavity-atom system.

Jiepeng Zhang1, Gessler Hernandez, Yifu Zhu

  • 1Department of Physics, Florida International University, Miami, Florida 33199, USA.

Optics Express
|June 12, 2008
PubMed
Summary

We demonstrate controlling light-matter interactions in cavity-atom systems. A control laser induces quantum interference, making the system opaque to cavity light, suppressing normal mode excitation.

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Area of Science:

  • Quantum optics
  • Cavity quantum electrodynamics
  • Atomic physics

Background:

  • Collective coupling of atoms to a cavity mode creates two normal modes.
  • Vacuum Rabi splitting separates these modes in energy.

Purpose of the Study:

  • To investigate the suppression of normal mode excitation in a cavity-atom system.
  • To demonstrate control over light-matter interactions using quantum interference.

Main Methods:

  • Coupling a control laser to the atomic system in free space.
  • Utilizing destructive quantum interference between excitation channels.
  • Experimenting with cold Rubidium (Rb) atoms in an optical cavity.

Main Results:

  • The control laser splits the normal modes of the cavity-atom system.
  • Two distinct excitation channels are opened.
  • Destructive quantum interference renders the system opaque to cavity-coupled light, suppressing normal mode excitation.

Conclusions:

  • Normal mode excitation in cavity-atom systems can be effectively suppressed.
  • Quantum interference provides a mechanism for controlling light propagation through such systems.
  • Experimental validation achieved using cold Rb atoms in an optical cavity.