223 research outputs found
Constructing Quantum Logic Gates Using q-Deformed Harmonic Oscillator Algebras
We study two-level q-deformed angular momentum states and us- ing q-deformed
harmonic oscillators, we provide a framework for con- structing qubits and
quantum gates. We also present the construction of some basic quantum gates
including CNOT, SWAP, Toffoli and Fredkin.Comment: Slightly modified version of the accepted manuscrip
The Inhomogeneous Invariance Quantum Supergroup of Supersymmetry Algebra
We consider an inhomogeneous quantum supergroup which leaves invariant a
supersymmetric particle algebra. The quantum sub-supergroups of this
inhomogeneous quantum supergroup are investigated.Comment: 11 pages. No figur
Self-localized Solitons of a q-Deformed Quantum System
Beyond a pure mathematical interest, q-deformation is promising for the
modeling and interpretation of various physical phenomena. In this paper, we
numerically investigate the existence and properties of the self-localized
soliton solutions of the nonlinear Schr\"{o}dinger equation (NLSE) with a
q-deformed Rosen-Morse potential. By implementing a Petviashvili method (PM),
we obtain the self-localized one and two soliton solutions of the NLSE with a
q-deformed Rosen-Morse potential. In order to investigate the temporal behavior
and stabilities of these solitons, we implement a Fourier spectral method with
a order Runge-Kutta time integrator. We observe that the
self-localized one and two solitons are stable and remain bounded with a
pulsating behavior and minor changes in the sidelobes of the soliton waveform.
Additionally, we investigate the stability and robustness of these solitons
under noisy perturbations. A sinusoidal monochromatic wave field modeled within
the frame of the NLSE with a q-deformed Rosen-Morse potential turns into a
chaotic wavefield and exhibits rogue oscillations due to modulation instability
triggered by noise, however, the self-localized solitons of the NLSE with a
q-deformed Rosen-Morse potential are stable and robust under the effect of
noise. We also show that soliton profiles can be reconstructed after a
denoising process performed using a Savitzky-Golay filter
Petviashvili Method for the Fractional Schr\"{o}dinger Equation
In this paper, we extend the Petviashvili method (PM) to the fractional
nonlinear Schr\"{o}dinger equation (fNLSE) for the construction and analysis of
its soliton solutions. We also investigate the temporal dynamics and
stabilities of the soliton solutions of the fNLSE by implementing a spectral
method, in which the fractional-order spectral derivatives are computed using
FFT routines, and the time integration is performed by a order
Runge-Kutta time-stepping algorithm. We discuss the effects of the order of the
fractional derivative, , on the properties, shapes, and temporal
dynamics of the solitons solutions of the fNLSE. We also examine the
interaction of those soliton solutions with zero, photorefractive and
q-deformed Rosen-Morse potentials. We show that for all of these potentials the
soliton solutions of the fNLSE exhibit a splitting and spreading behavior, yet
their dynamics can be altered by the different forms of the potentials and
noise considered.Comment: Typos are corrected and results and discussions are elaborated in v2
of the pape
Occupational Health and Safety in Turkey: Problems And Solutions
Since the 1980's, the rate of foreign investments by multi-national companies have been increasing very fast, the structure and percentage of sectors have been changing dramatically causing more occupational health and safety problems than ever before in Turkey. Industrialized nations transfer their old and more risky factory equipments, materials and more risky jobs such as mining to new industrializing countries; thus, industrializing countries such as Turkey have been facing serious occupational health and safety problems. The purpose of this study is to analyze occupational health and safety problems in Turkey by using current statistics and give suggestions to minimize the severe effects of occupational accidents
Creation of quantum correlations between two atoms in a dissipative environment from an initial vacuum state
We have investigated the effect of counter-rotating terms on the dynamics of
entanglement and quantum discord between two identical atoms interacting with a
lossy single mode cavity field for a system initially in a vacuum state. The
counter-rotating terms are found to lead to steady states in the long time
limit which can have high quantum discord, but have no entanglement. The effect
of cavity decay rate on this steady state quantum discord has been also
investigated, surprisingly, the increase in cavity decay rate is found to both
enhance and maximize the steady quantum discord for separable states.Comment: Effects of counter-rotating interaction terms on quantum discor
Dynamics of Entanglement and Bell-nonlocality for Two Stochastic Qubits with Dipole-Dipole Interaction
We have studied the analytical dynamics of Bell nonlocality as measured by
CHSH inequality and entanglement as measured by concurrence for two noisy
qubits that have dipole-dipole interaction. The nonlocal entanglement created
by the dipole-dipole interaction is found to be protected from sudden death for
certain initial states
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