scholarly journals Two-qubit non-locality interacting time-dependently with a parametric amplifier cavity with Stark-shift nonlinearity

2021 ◽  
Vol 60 (6) ◽  
pp. 5649-5654
Author(s):  
Abdel-Baset A. Mohamed ◽  
Afrah Y. AL-Rezami ◽  
Abdel-Haleem Abdel-Aty
Keyword(s):  
Stark Shift ◽  
Parametric Amplifier ◽  
Non Locality

Dynamics of entanglement and population inversion of two qubits in a hybrid nonlinear system

2021 ◽  
pp. 2150037
Author(s):  
E. M. Khalil ◽  
A.-B. A. Mohamed
Keyword(s):  
Electromagnetic Field ◽  
Nonlinear System ◽  
Analytical Solution ◽  
Nonlinear Interaction ◽  
Population Inversion ◽  
Stark Shift ◽  
Parametric Amplifier ◽  
Kerr Medium ◽  
Interaction Terms

An analytical solution is obtained when the Kerr medium and Stark shift are considered as nonlinear interaction terms to the system containing two-qubit and two-mode electromagnetic field from the parametric amplifier. Dynamics of the population inversion, cavity–qubit and qubit–qubit entanglements are analyzed under the unitary cavity–qubit interaction, the Kerr medium and the Stark shift. The population inversion of a qubit presents periodic revivals and collapses. The results show that the entanglement and the population inversion as well as the inversion have the same stable intervals, that is, the collapse intervals. It is found that the Kerr medium and the Stark shift may lead to reduction of the periods and the amplitudes of the population inversion and the cavity–qubit/qubit–qubit entanglement. The deteriorated qubit–qubit/cavity–qubit entanglement and the population inversion, due to the Kerr medium, may be increased by increasing the Stark shift and vice versa.

scholarly journals Atomic Non-Locality Dynamics of Two Moving Atoms In A Hybrid Nonlinear System: Concurrence, Uncertainty-Induced Non-Locality And Bell Inequality

2021 ◽  
Author(s):  
A.-B. A. Mohamed ◽  
E.M. Khalil
Keyword(s):  
Nonlinear System ◽  
Quantum Correlation ◽  
Bell Inequality ◽  
Location Parameter ◽  
Quantum Correlations ◽  
Stark Shift ◽  
Time Dependent ◽  
The Mean ◽  
The Difference ◽  
Non Locality

Abstract The paper explores the non-locality dynamics of two moving atoms in a hybrid nonlinear system, which describes a nondegenerate parametric amplifier cavity containing two moving atoms with Stark shift interactions. Based on the Bell function, uncertainty-induced non-locality and concurrence, the two moving atomic non-locality is calculated numerically, when the cavity is filled initially by pair coherent fields. The results showed that the hybrid nonlinear qubit-cavity interactions have a high ability to generating quantum correlations. The amount of the generated quantum correlation can be improved and accelerated significantly with the increase of the time-dependent qubit location parameter. The increase of the Stark shift ratio and the difference between the mean-number photons of the two cavity fields leads to a clear deterioration of the generated quantum correlation.

PARAMETERS OF A JOSEPHSON TUNNEL JUNCTION ARRAY PARAMETRIC AMPLIFIER

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1234-C6-1235 ◽  
Author(s):  
T. Claeson ◽  
S. Rudner ◽  
S. Wahlsten
Keyword(s):  
Tunnel Junction ◽  
Parametric Amplifier ◽  
Josephson Tunnel ◽  
Junction Array

STARK SHIFT AND BROADENING OF ATOMIC LINES AS OBSERVED ON OPTOGALVANIC SPECTRA OF NOBLE GASES

1983 ◽  
Vol 44 (C7) ◽  
pp. C7-497-C7-504 ◽  
Author(s):  
T. Nakajima ◽  
N. Uchitomi ◽  
Y. Adachi ◽  
S. Maeda ◽  
C. Hirose
Keyword(s):  
Noble Gases ◽  
Stark Shift ◽  
Atomic Lines

“Non-locality”

2017 ◽  
Author(s):  
Richard Healey
Keyword(s):  
Quantum Theory ◽  
Quantum Entanglement ◽  
Quantum States ◽  
Entangled States ◽  
Entangled Quantum States ◽  
Action At A Distance ◽  
Insight Into ◽  
Non Locality

Quantum entanglement is popularly believed to give rise to spooky action at a distance of a kind that Einstein decisively rejected. Indeed, important recent experiments on systems assigned entangled states have been claimed to refute Einstein by exhibiting such spooky action. After reviewing two considerations in favor of this view I argue that quantum theory can be used to explain puzzling correlations correctly predicted by assignment of entangled quantum states with no such instantaneous action at a distance. We owe both considerations in favor of the view to arguments of John Bell. I present simplified forms of these arguments as well as a game that provides insight into the situation. The argument I give in response turns on a prescriptive view of quantum states that differs both from Dirac’s (as stated in Chapter 2) and Einstein’s.

Phenomena and devices at the quantum scale and the mesoscale

2017 ◽  
Author(s):  
Sandip Tiwari
Keyword(s):  
Coulomb Blockade ◽  
Secure Communication ◽  
Quantum Hall ◽  
Nanoscale Device ◽  
Self Energy ◽  
Stability Diagrams ◽  
Charge Stability ◽  
Bohm Effect ◽  
Aharonov Bohm ◽  
Non Locality

Unique nanoscale phenomena arise in quantum and mesoscale properties and there are additional intriguing twists from effects that are classical in origin. In this chapter, these are brought forth through an exploration of quantum computation with the important notions of superposition, entanglement, non-locality, cryptography and secure communication. The quantum mesoscale and implications of nonlocality of potential are discussed through Aharonov-Bohm effect, the quantum Hall effect in its various forms including spin, and these are unified through a topological discussion. Single electron effect as a classical phenomenon with Coulomb blockade including in multiple dot systems where charge stability diagrams may be drawn as phase diagram is discussed, and is also extended to explore the even-odd and Kondo consequences for quantum-dot transport. This brings up the self-energy discussion important to nanoscale device understanding.

Quantum Becoming?

2017 ◽  
Author(s):  
Craig Callender
Keyword(s):  
Quantum Mechanics ◽  
Quantum Theory ◽  
Quantum Time ◽  
Quantum Non Locality ◽  
Time Quantum ◽  
Temporal Becoming ◽  
Non Locality ◽  
Quantum Wavefunction

Two of quantum mechanics’ more famed and spooky features have been invoked in defending the idea that quantum time is congenial to manifest time. Quantum non-locality is said by some to make a preferred foliation of spacetime necessary, and the collapse of the quantum wavefunction is held to vindicate temporal becoming. Although many philosophers and physicists seek relief from relativity’s assault on time in quantum theory, assistance is not so easily found.

Classical Kinetic Theory

2018 ◽  
Author(s):  
Klaus Morawetz
Keyword(s):  
Kinetic Equation ◽  
Equation Of State ◽  
Mean Field ◽  
Ideal Gas ◽  
Hydrodynamic Equations ◽  
Free Particles ◽  
Internal Mechanism ◽  
The Mean ◽  
Energy Gains ◽  
Non Locality

The classical non-ideal gas shows that the two original concepts of the pressure based of the motion and the forces have eventually developed into drift and dissipation contributions. Collisions of realistic particles are nonlocal and non-instant. A collision delay characterizes the effective duration of collisions, and three displacements, describe its effective non-locality. Consequently, the scattering integral of kinetic equation is nonlocal and non-instant. The non-instant and nonlocal corrections to the scattering integral directly result in the virial corrections to the equation of state. The interaction of particles via long-range potential tails is approximated by a mean field which acts as an external field. The effect of the mean field on free particles is covered by the momentum drift. The effect of the mean field on the colliding pairs causes the momentum and the energy gains which enter the scattering integral and lead to an internal mechanism of energy conversion. The entropy production is shown and the nonequilibrium hydrodynamic equations are derived. Two concepts of quasiparticle, the spectral and the variational one, are explored with the help of the virial of forces.

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