76 research outputs found
Evolution of the superposition of displaced number states with the two-atom multiphoton Jaynes-Cummings model: interference and entanglement
In this paper we study the evolution of the two two-level atoms interacting
with a single-mode quantized radiation field, namely, two-atom multiphoton
Jaynes-Cummings model when the radiation field and atoms are initially prepared
in the superpostion of displaced number states and excited atomic states,
respectively. For this system we investigate the atomic inversion, Wigner
function, phase distribution and entanglement.Comment: 18 pages, 17 figure
Revival-collapse phenomenon in the quadrature squeezing of the multiphoton Jaynes-Cummings model with the binomial states
In this paper we study the interaction between two-level atom and quantized
single-mode field, namely, Jaynes-Cummings model (JCM). The field and the atom
are initially prepared in the binomial state and the excited atomic state,
respectively. For this system we prove that the revival-collapse phenomenon
exhibited in the atomic inversion of the standard JCM can be numerically
(naturally) manifested in the evolution of the squeezing factor of the
three-photon (standard) JCM provided that the initial photon-number
distribution of the radiation has a smooth envelope.Comment: 14 pages, 4 figures, Comments are most welcom
Squeezing properties of the Kerr-down conversion system
In this Letter we describe a new two-mode system, which consists of Kerr-like
medium and down conversion process, called the Kerr-down conversion system.
Under a certain condition we can obtain an exact solution of the dynamical
equations of motion. For this system we investigate different kinds of
quadrature squeezing, e.g., single-mode, two-mode and sum-squeezing. Also we
give a more general definition of the principal squeezing. We show that the
amounts of nonclassical effects produced by the Kerr-like and down-conversion
processes separately are greater than those obtained from the Kerr-down
conversion system where both the processes are in competition.Comment: 12 pages, 3 figure
Evolution of Fock states in three mixed harmonic oscillators: quantum statistics
In this communication we investigate the quantum statistics of three harmonic
oscillators mutually interacting with each other considering the modes are
initially in Fock states. After solving the equations of motion, the squeezing
phenomenon, sub-Poissonian statistics and quasiprobability functions are
discussed. We demonstrate that the interaction is able to produce squeezing of
different types. We show also that certain types of Fock states can evolve in
this interaction into thermal state and squeezed thermal state governed by the
interaction parameters.Comment: 25 pages, 7 figure
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