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Phase control of collective quantum dynamics.

Mihai Macovei1, Jörg Evers, Christoph H Keitel

  • 1Theoretische Quantendynamik, Physikalisches Institut, Universität Freiburg, H.-Herder-Strasse 3, 79104 Freiburg, Germany.

Physical Review Letters
|December 20, 2003
PubMed
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Researchers manipulated the steady-state behavior of three-level atoms using laser fields. The relative phase controls atomic state population, enabling applications like optical switching and fluorescence intensity control.

Area of Science:

  • Atomic physics
  • Quantum optics
  • Condensed matter theory

Background:

  • Three-level atomic systems are fundamental in quantum optics.
  • Dipole-dipole interactions influence collective atomic behavior.
  • Coherent driving fields enable manipulation of atomic populations.

Purpose of the Study:

  • Investigate the manipulation of steady-state behavior in V or Lambda three-level atoms.
  • Explore the role of relative phase between driving fields.
  • Identify applications in optical switching and fluorescence control.

Main Methods:

  • Theoretical investigation of dipole-interacting three-level atoms.
  • Analysis of steady-state behavior as a function of driving field relative phase.
  • Modeling of atomic ensembles for larger samples.

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Main Results:

  • The relative phase of driving fields effectively controls population transfer to trapping states.
  • Complete population or depopulation of trapping states is achievable.
  • Collective steady-state resonance fluorescence intensity can be controlled.

Conclusions:

  • The relative phase is a key parameter for manipulating atomic ensembles.
  • Prepared atomic samples can function as optical switching devices.
  • Control over collective resonance fluorescence has potential applications.