Dynamics of a Coherently Driven Nondegenerate Three-Level Atom
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Date
2013-06
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Addis Ababa University
Abstract
In this thesis we study the statistical and squeezing properties of the light
emitted by a nondegenerate three-level atom driven by coherent light and in a
cavity coupled to a vacuum reservior via a single-port mirror. We carry out our
analysis by putting the noise operators associated with the vacuum reservior in
normal order and applying the large-time approximation.
It is found that the mean of the two cavity modes are equal. In addition,
the photon number statistics is Poissonian for < 0:13 and sub-Poissonian for
0:13. Our result shows that the photon numbers of modes a and b are
uncorrelated. We have also calculated the quadrature variance for the separate
modes and for the superposition of the two modes. It turns out that mode a is in
a chaotic state for arbitrary values of
c and
but mode b is in chaotic state for
c <<
and in a coherent state for
c >>
and the superposed cavity modes are
in a squeezed state. Furthermore, we have determined the quadrature squeezing
of the superposed cavity modes. The maximum quadrature squeezing is found to
be 43% below the coherent-state level
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Keywords
Three-Level Atom