scholarly journals Superactivation of monogamy relations for nonadditive quantum correlation measures

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
Zhi-Xiang Jin ◽  
Shao-Ming Fei
2016 ◽  
Vol 93 (6) ◽  
Author(s):  
Kunal Sharma ◽  
Tamoghna Das ◽  
Aditi Sen(De) ◽  
Ujjwal Sen

2019 ◽  
Vol 17 (04) ◽  
pp. 1950034
Author(s):  
Weijing Li

A kind of new geometric measure of quantum correlations is formulated. The proposed formulation is in terms of the quantum Tsallis relative entropy and can naturally be viewed as a one-parameter extension quantum discordlike measure that satisfies all requirements of a good measure of quantum correlations. It is of an elegant analytic expression and contains several existing good quantum correlation measures as special cases. The partial coherence measure is also investigated.


2016 ◽  
Vol 49 (21) ◽  
pp. 215501 ◽  
Author(s):  
L Rebón ◽  
R Rossignoli ◽  
J J M Varga ◽  
N Gigena ◽  
N Canosa ◽  
...  

2014 ◽  
Vol 108 (1) ◽  
pp. 10003 ◽  
Author(s):  
F. M. Paula ◽  
A. Saguia ◽  
Thiago R. de Oliveira ◽  
M. S. Sarandy

2021 ◽  
Vol 19 (1) ◽  
pp. 015204
Author(s):  
S Bhuvaneswari ◽  
R Muthuganesan ◽  
R Radha

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.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Till Jonas Frederick Johann ◽  
Ugo Marzolino

AbstractEntanglement is one of the strongest quantum correlation, and is a key ingredient in fundamental aspects of quantum mechanics and a resource for quantum technologies. While entanglement theory is well settled for distinguishable particles, there are five inequivalent approaches to entanglement of indistinguishable particles. We analyse the different definitions of indistinguishable particle entanglement in the light of the locality notion. This notion is specified by two steps: (i) the identification of subsystems by means of their local operators; (ii) the requirement that entanglement represent correlations between the above subsets of operators. We prove that three of the aforementioned five entanglement definitions are incompatible with any locality notion defined as above.


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