Effects of intrinsic decoherence on discord-like correlation measures of two-qubit spin squeezing model

2021 ◽  
Author(s):  
Venkat Abhignan ◽  
Muthuganesan Rajendran
Keyword(s):  
Spin Squeezing ◽  
Intrinsic Decoherence ◽  
Spin Squeezing Model ◽  
Correlation Measures

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.

Dense Coding in Two Kinds of Two-Qubit Spin Squeezing Model

2019 ◽  
Vol 58 (10) ◽  
pp. 3602-3610 ◽  
Author(s):  
Yong-Qiang Li ◽  
Xiao Zhao ◽  
Xiang-Fu Jia ◽  
Guo-Hui Yang
Keyword(s):  
Spin Squeezing ◽  
Dense Coding ◽  
Spin Squeezing Model

QUANTUM ENTANGLEMENT OF THREE ATOMS INDUCED BY FOCK STATE

2008 ◽  
Vol 19 (05) ◽  
pp. 775-783
Author(s):  
XIUWU WANG ◽  
XIAOHONG ZHANG
Keyword(s):  
Sudden Death ◽  
Radiation Field ◽  
Quantum Entanglement ◽  
Single Mode ◽  
Spin Squeezing ◽  
Entanglement Sudden Death ◽  
Intrinsic Decoherence ◽  
Potential Measurement ◽  
Fock State ◽  
Quantized Radiation Field

In this paper, we study the quantum entanglement of three two-level atoms under the action of Fock state of a single-mode quantized radiation field. Milburn model is considered. Concurrence of the two atoms is given explicitly. As is expected, because of the intrinsic decoherence, Concurrence comes to a stationary value. A rule is summarized between this value and entanglement sudden death. As for the potential measurement of multi-particle entanglement, spin squeezing parameter is calculated.

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