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Dark-state polaritons in electromagnetically induced transparency

Fleischhauer1, Lukin

  • 1Sektion Physik, Ludwig-Maximilians-Universitat Munchen, Theresienstrasse 37, D-80333 Munchen, Germany.

Physical Review Letters
|September 16, 2000
PubMed
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Researchers discovered dark-state polaritons, which are stable light-matter excitations. These polaritons allow for the control and trapping of light pulses using quantum fields and electromagnetically induced transparency.

Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Atomic physics

Background:

  • Electromagnetically induced transparency (EIT) enables control over light propagation.
  • Quantum fields and light-matter interactions are fundamental to quantum information science.

Purpose of the Study:

  • To identify and characterize form-stable coupled excitations of light and matter, termed dark-state polaritons.
  • To investigate the control of dark-state polariton properties, including group velocity, using external fields.

Main Methods:

  • Theoretical analysis of quantum field propagation in EIT media.
  • Modeling of light-matter coupling and the role of the mixing angle.
  • Investigation of external coherent field effects on polariton dynamics.

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Main Results:

  • Identification of dark-state polaritons as stable, coupled light-matter excitations.
  • Demonstration that polariton group velocity is tunable via the light-matter mixing angle.
  • Observation of light pulse deceleration and trapping, with quantum state mapping onto matter states.

Conclusions:

  • Dark-state polaritons offer a novel platform for coherent control of quantum fields.
  • Reversible coherent-control techniques using dark-state polaritons have potential applications in quantum information processing and storage.