21 research outputs found
Generation of three-qubit entangled states using coupled multi-quantum dots
We discuss a mechanism for generating a maximum entangled state (GHZ) in a
coupled quantum dots system, based on analytical techniques. The reliable
generation of such states is crucial for implementing solid-state based quantum
information schemes. The signature originates from a remarkably weak field
pulse or a far off-resonance effects which could be implemented using
technology that is currently being developed. The results are illustrated with
an application to a specific wide-gap semiconductor quantum dots system, like
Zinc Selenide (ZnSe) based quantum dots.Comment: 8 pages, 2 figure
Enhancement of nonclassical properties of two qubits via deformed operators
We explore the dynamics of two atoms interacting with a cavity field via
deformed operators. Properties of the asymptotic regularization of entanglement
measures proving, for example, purity cost, regularized fidelity and accuracy
of information transfer are analyzed. We show that the robustness of a
bipartite system having a finite number of quantum states vanishes at finite
photon numbers, for arbitrary interactions between its constituents and with
cavity field. Finally it is shown that the stability of the purity and the
fidelity is improved in the absence of the deformation parameters
State transfer in intrinsic decoherence spin channels
By analytically solving the master equation, we investigate quantum state
transfer, creation and distribution of entanglement in the model of Milburn's
intrinsic decoherence. Our results reveal that the ideal spin channels will be
destroyed by the intrinsic decoherence environment, and the detrimental effects
become severe as the decoherence rate and the spin chain length
increase. For infinite evolution time, both the state transfer fidelity and the
concurrence of the created and distributed entanglement approach steady state
values, which are independent of the decoherence rate and decrease as
the spin chain length increases. Finally, we present two modified spin
chains which may serve as near perfect spin channels for long distance state
transfer even in the presence of intrinsic decoherence environments .Comment: 11 pages, 11 figure
ATMS Implementation System for Identifying Traffic Conditions Leading to Potential Crashes
Computational analysis of a nonlinear fractional emerging telecommunication model with higher–order dispersive cubic–quintic
In this paper, the modifieds implest equation method as one of the computational schemes is applied to a nonlinear fractional emerging telecommunication model with higher-orderer dispersive cubic - quintic for constructing the exact traveling and solitary wave solutions. This model is also known with higher - order dispersive cubic - quintic nonlinear complex fractional Schro ̈dinger (NLCFS) equation. Moreover, it is used to explain the physical nature of the waves spread, especially in the dispersive medium. The disadvantages of the B - spline schemes are investigated based on the obtained analytical solutions. Some obtained computational solutions are sketched to more illustration of the wave dynamics in the dispersive medium
Analytical and numerical solutions with bifurcation analysis for the nonlinear evolution equation in (2+1)-dimensions
This paper is focused on the nonlinear evolution equation in (2+1)-dimensions which is found in different engineering and scientific areas. Many sets of exact soliton solutions of the nonlinear evolution equation in (2+1)-dimensions are presented via two analytical methods such as the Kudryashov method and the G′G-expansion method. Numerical solutions based on the finite difference method are introduced. The bifurcation analysis of solitary wave solutions is exhibited. Our analytical and numerical results are compared and illustrate them through some tables and graphical figures