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| VOLUME 92 | ISSUE 12 |
PAGE 889
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| Generation of two-photon correlation in a four-level system
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Y. H. Ma, E. Wu
School of mathematics, physics and biological engineering,
Inner Mongolia University of Technology, 041010 Baotou, P.R.China
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Abstract
We study the quantum correlation of a coherently foul-level atomic
system coupled by two coherent driven fields. Used the wave function
technique, an explicit expression of the photon-photon correlation
function is derived. The influence of the driven field as well as
the detuning on the second correlation function are investigated. We
find that the second correlation function can be controlled by the
driven field or the detuning of two coupling lasers. So we can
control the magnitude of the joint detection probability by the
driving fields. More importantly, we show that this correlated
photon states can serve as atomic memory.
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