Non-classical photon pair generation in atomic vapours

A scheme for the generation of non-classical pairs of photons in atomic vapours is proposed. The scheme exploits the fact that the cross correlation of the emission of photons from the extreme transitions of a four-level cascade system shows anti-bunching which has not been reported earlier and whic...

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Bibliographic Details
Published in:arXiv.org 2007-07
Main Author: Sandhya, S N
Format: Article
Language:English
Subjects:
Bunching
Cross correlation
Emission
Frequencies
Photons
Signal processing
Time lag
Online Access:Get full text
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Summary:A scheme for the generation of non-classical pairs of photons in atomic vapours is proposed. The scheme exploits the fact that the cross correlation of the emission of photons from the extreme transitions of a four-level cascade system shows anti-bunching which has not been reported earlier and which is unlike the case of the three level cascade emission which shows bunching. The Cauchy-Schwarz inequality which is the ratio of cross-correlation to the auto correlation function in this case is estimated to be \(10^3-10^6\) for controllable time delay, and is one to four orders of magnitude larger compared to previous experiments. The choice of Doppler free geometry in addition to the fact that at three photon resonance the excitation/deexcitation processes occur in a very narrow frequency band, ensures cleaner signals.
ISSN:2331-8422
DOI:10.48550/arxiv.0707.0720