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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

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Published on: November 30, 2012

Photon-number selective group delay in cavity induced transparency.

Gor Nikoghosyan¹, Michael Fleischhauer

¹Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany.

Physical Review Letters

|September 28, 2010

Summary

This summary is machine-generated.

The group velocity of light pulses in atoms depends on their quantum state. This allows for the separation of single photons, creating a deterministic single-photon source.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Area of Science:

Quantum optics
Atomic physics
Cavity quantum electrodynamics

Background:

Understanding light-matter interactions is crucial in quantum optics.
Atom-cavity systems are fundamental for quantum information processing.
Deterministic single-photon sources are essential for quantum technologies.

Purpose of the Study:

To investigate the dependence of probe pulse group velocity on its quantum state in a Λ-type atomic ensemble.
To explore the potential of using this phenomenon for single-photon generation.

Main Methods:

Theoretical analysis of a Λ-type atomic ensemble coupled to a quantized cavity mode.
Investigation of the system in the strong-coupling regime.
Analysis of the probe pulse group delay as a function of photon number.

Main Results:

The group velocity of the probe pulse is shown to be dependent on the input probe pulse's quantum state.
In the strong-coupling regime, the probe group delay exhibits photon-number selectivity.
This selectivity allows for the discrimination between single photons and multi-photon components.

Conclusions:

The photon-number selective group delay in strongly coupled atom-cavity systems offers a novel method for generating deterministic single photons.
This approach can spatially separate single photons from higher photon-number components.
The findings pave the way for improved single-photon sources for quantum applications.