Intrinsic decoherence effects on quantum correlations dynamics

2022 ◽  
Vol 54 (2) ◽  
Author(s):  
M. Essakhi ◽  
Y. Khedif ◽  
M. Mansour ◽  
M. Daoud
Keyword(s):  
Quantum Correlations ◽  
Intrinsic Decoherence

Robustness of Quantum Correlations in Entangled Two su(2) Systems Non-mutually Interacting with su(1, 1) System under Intrinsic Decoherence

2018 ◽  
Vol 25 (03) ◽  
pp. 1850015
Author(s):  
A.-B. A. Mohamed ◽  
M. S. Abdalla ◽  
A.-S. F. Obada
Keyword(s):  
Steady State ◽  
Quantum Correlation ◽  
Quantum Discord ◽  
Bell State ◽  
Analytical Description ◽  
Quantum Correlations ◽  
Total System ◽  
Intrinsic Decoherence ◽  
Geometric Quantum Discord ◽  
Phase Decoherence

Two two-level systems generated by su(2) algebra are initially prepared in a maximum nonsymmetric Bell state and having no mutual interaction. Each su(2)-system spatially interacts with two-mode cavity field in the nondegenerate parametric amplifier type cast through operators governed by su(1, 1) Lie algebra. An analytical description for the time evolution of the final state of the total system with the effect of intrinsic decoherence is found. Therefore, the robustness of the quantum correlations between the two su(2)-system is investigated by means of geometric quantum discord, measurement-induced nonlocality and negativity. We analyze in some detail the influence of initial coherence intensities, detuning and phase decoherence parameters on the steady-state correlation. We find that the steady-state correlations can be generated and enhanced by controlling the parameters of: the initial coherence intensities, the Bargmman index and the detuning. It is shown that the phenomenon of sudden death and re-birth of entanglement, and the sudden changes of the geometric quantum correlation can be controlled by these parameters. We find that the robustness of the quantum correlation can be greatly enhanced by the Bargmman index and the resonance detuning. Negativity is the measure most susceptible to phase decoherence, while geometric quantum discord and measurement-induced nonlocality are the more robust measures.

scholarly journals Fisher and Skew Information Correlations of Two Coupled Trapped Ions: Intrinsic Decoherence and Lamb-Dicke Nonlinearity

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2243
Author(s):  
Abdel-Baset A. Mohamed ◽  
Ahmed Farouk ◽  
Mansour F. Yassen ◽  
Hichem Eleuch
Keyword(s):  
Quantum Information Processing ◽  
Center Of Mass ◽  
Quantum Fisher Information ◽  
Quantum Correlations ◽  
Trapped Ions ◽  
Engineering Properties ◽  
Intrinsic Decoherence ◽  
Quantum Uncertainty ◽  
Trapped Ion ◽  
Local Quantum

It is well known that many quantum information processing methods in artificial atoms depend largely on their engineering properties and their ability to generate quantum correlations. In this paper, we investigate the non-classical correlation dynamics of two trapped ions by using local quantum Fisher information, local quantum uncertainty, as well as logarithmic negativity. The system engineering is designed such that the two-trapped-ions work as two diploe-coupled qubits in a Lamb-Dicke regime. The center-of-mass vibrational modes are initially in coherent/even coherent states. It is found that the two-trapped-ions correlations can be controlled by the Lamb-Dicke nonlinearity, the nonclassicality effect of the initial center-of-mass vibrational mode, as well as the trapped-ion coupling and the intrinsic decoherence. The sudden changes in the non-classical correlations and their stability are shown against Lamb-Dicke nonlinearity, the nonclassicality, the trapped-ion coupling, and the intrinsic decoherence.

scholarly journals Quantum Fisher Information and Bures Distance Correlations of Coupled Two Charge-Qubits Inside a Coherent Cavity with the Intrinsic Decoherence

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 352
Author(s):  
Abdel-Baset A. Mohamed ◽  
Eied. M. Khalil ◽  
Mahmoud M. Selim ◽  
Hichem Eleuch
Keyword(s):  
Fisher Information ◽  
Coherent States ◽  
Quantum Fisher Information ◽  
Quantum Correlations ◽  
Freezing Behavior ◽  
Intrinsic Decoherence ◽  
Decoherence Rate ◽  
Local Quantum ◽  
Decoherence Effect ◽  
Bures Distance

The dynamics of two charged qubits containing Josephson Junctions inside a cavity are investigated under the intrinsic decoherence effect. New types of quantum correlations via local quantum Fisher information and Bures distance norm are explored. We show that we can control the quantum correlations robustness by the intrinsic decoherence rate, the qubit-qubit coupling as well as by the initial coherent states superposition. The phenomenon of sudden changes and the freezing behavior for the local quantum Fisher information are sensitive to the initial coherent state superposition and the intrinsic decoherence.

Signatures of intrinsic decoherence and weak measurement on quantum correlations

2021 ◽  
Vol 19 (1) ◽  
pp. 015204
Author(s):  
S Bhuvaneswari ◽  
R Muthuganesan ◽  
R Radha
Keyword(s):  
Magnetic Field ◽  
Quantum Correlation ◽  
Quantum Correlations ◽  
Spin Squeezing ◽  
Weak Measurement ◽  
Intrinsic Decoherence ◽  
Dynamical Behaviors ◽  
Correlation Measures ◽  
The Impact

Abstract In this article, we consider a pair of spin-1/2 particles with squeezing coupling serving as the physical carrier of quantum information. We then examine the dynamics of quantum correlation quantified by the entanglement and measurement-induced nonlocality (MIN) under the intrinsic decoherence. The impact of intrinsic decoherence on the dynamical behaviors of quantum correlations is investigated. We show that the MIN quantities are more robust, while intrinsic decoherence cause sudden death in entanglement. Besides, we highlight the role of spin squeezing coupling and external magnetic field on quantum correlation measures. Finally, we investigate the impact of weak measurement on MIN.

Sign in / Sign up

Export Citation Format

Share Document