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Quasi-light Storage for Optical Data Packets
07:45

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Published on: February 6, 2014

Efficient light storage in a Lambda system due to coupling between lower levels.

A Eilam1, A D Wilson-Gordon, H Friedmann

  • 1Department of Chemistry, Bar-Ilan University, Ramat Gan 52900, Israel.

Optics Letters
|June 17, 2009
PubMed
Summary
This summary is machine-generated.

A weak field applied during storage in Lambda systems modifies spin coherence and probe amplitude. This technique enhances or reduces the retrieved probe signal based on the relative phase, offering distortion-free control.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Nonlinear optics

Background:

  • Lambda systems are crucial for quantum phenomena like electromagnetically induced transparency.
  • Controlling spin coherence is vital for quantum information processing and memory.
  • Probe propagation in atomic systems is influenced by applied fields.

Purpose of the Study:

  • To investigate the effect of a lower-level coupling field on spin coherence and probe amplitude.
  • To analyze the phase-dependent behavior of the retrieved probe signal.
  • To demonstrate a method for controlling probe characteristics without introducing distortion.

Main Methods:

  • Analytical solutions derived from the optical Bloch equations.
  • Numerical simulations of the probe propagation dynamics.
  • Modeling of a three-level Lambda system interacting with multiple light fields.

Main Results:

  • Application of a weak lower-level coupling field modifies spin coherence.
  • The retrieved probe amplitude is altered by the coupling field in a phase-dependent manner.
  • Amplification of the retrieved probe occurs at relative phases of 0 or pi, while attenuation occurs at pi/2.

Conclusions:

  • A weak coupling field provides a distortion-free method to control spin coherence and probe amplitude in Lambda systems.
  • The phase of the coupling field is a critical parameter for manipulating the retrieved probe signal.
  • This technique offers potential for advanced optical signal processing and quantum memory applications.