36 citations · 289 across the 35 of their papers we have counts for
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Quantum properties of superposition states, squeezed states, and of some parametric processes
Faisal Aly Aly El-Orany
In this doctoral thesis we have studied the quantum properties of several models which have been classified as statical and dynamical systems. The first part has been devoted to in…
Evolution of Fock states in three mixed harmonic oscillators: quantum statistics
Faisal A. A. El-Orany, J. Perina, M. Sebawe Abdalla
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. A…
Evolution of cat states in a dissipative parametric amplifier: decoherence and entanglement
Faisal A. A. El-Orany, J. Perina, V. Perinova +1
The evolution of the Schrödinger-cat states in a dissipative parametric amplifier is examined. The main tool in the analysis is the normally ordered characteristic function. Squeez…
Quantum statistics and dynamics of nonlinear couplers with nonlinear exchange
M. Sebawe Abdalla, Faisal A. A. El-Orany, J. Perina
In this paper we derive the quantum statistical and dynamical properties of nonlinear optical couplers composed of two nonlinear waveguides operating by the second subharmonic gene…
SU(2)- and SU(1,1)-squeezing of interacting radiation modes
M. Sebawe Abdalla, Faisal A. A. El-Orany, J. Perina
In this communication we discuss SU(1,1)- and SU(2)-squeezing of an interacting system of radiation modes in a quadratic medium in the framework of Lie algebra. We show that regard…
Generation of squeezed light in a nonlinear asymmetric directional coupler
Faisal A. A. El-Orany, J. Perina, M. Sebawe Abdalla
We show that a nonlinear asymmetric directional coupler composed of a linear waveguide and a nonlinear waveguide operating by nondegenerate parametric amplification is an effective…
Phase properties of the superposition of squeezed and displaced number states
Faisal A. A. El-Orany, J. Perina, M. Sebawe Abdalla
We show that a nonlinear asymmetric directional coupler composed of a linear waveguide and a nonlinear waveguide operating by nondegenerate parametric amplification is an effective…
Comment on "Deterministic six states protocol for quantum communication" [Phys. Lett. A 358 (2006) 85]
Faisal A. A. El-Orany
In [J.S. Shaari, M. Lucamarini, M.R.B. Wahiddin, Phys. Lett. A 358 (2006) 85-90] the deterministic six states protocol (6DP) for quantum communication has been developed. This prot…
Squeezing properties of the Kerr-down conversion system
Faisal A. A. El-Orany, M. Sebawe Abdalla, J. Perina
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…
Robustness of nonclassical superpositions states against decoherence
Faisal A. A. El-Orany
We make a comparative study of quadrature squeezing, photon-number distribution and Wigner function in a decayed quantum system. Specifically, for a field mode prepared initially i…
Is the average of the spin-correlation elements the real measure of the entanglement of the two-qubit systems?
Faisal A. A. El-Orany
Based on the Pauli spin operators we develop the notion of the spin-correlation matrix for the two-qubit system. If this matrix is non-zero, the measure of the correlation between…
Analytical approach for treating unitary quantum systems with initial mixed states
Faisal A. A. El-Orany
The mixed states are important in quantum optics since they frequently appear in the decoherence problems. When one of the components of the system is prepared in the mixed state a…