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Chin. Phys. B, 2020, Vol. 29(11): 110301    DOI: 10.1088/1674-1056/aba5fa
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Effect of weak measurement on quantum correlations

L Jebli1, †, M Amzioug4,5, S E Ennadifi4, N Habiballah2,3, and M Nassik1$
1 EPTHE, Department of Physics, Faculty of Sciences, Ibn Zohr University, Agadir, Morocco
2 Faculty of Applied Sciences, Ibn Zohr University, Ait-Melloul, Morocco
3 Abdus Salam International Center for Theoretical Physics, Strada Costiera, 11 I-34151, Trieste, Italy
4 LHEP-MS, Department of Physics, Faculty of Science Mohammed V University, Rabat, Morocco
5 Department of Physics, Ecole Normale Sup´eieure (ENS), Mohammed V University, Rabat, Morocco

We investigate the local quantum uncertainty (LQU ) in weak measurement. An expression of weak LQU is explicitly determined. Also, we consider some cases of three special X states, Werner state, circulant two-qubit states, and Heisenberg model via LQU in normal and weak measurements. We find that the LQU in weak measurement is weaker than the case of strong measurement.

Keywords:  local quantum uncertainty      weak measurement      weak local quantum uncertainty  
Received:  21 April 2020      Revised:  29 June 2020      Accepted manuscript online:  15 July 2020
Corresponding Authors:  Corresponding author. E-mail:   

Cite this article: 

L Jebli, M Amzioug, S E Ennadifi, N Habiballah, and M Nassik$ Effect of weak measurement on quantum correlations 2020 Chin. Phys. B 29 110301

Fig. 1.  

Effect of measurement strength on LQU and WLQU for various z with x = 0.2, x = 0.8, x = 1.5.

Fig. 2.  

Weak LQU for different values of x with z = 1.

Fig. 3.  

LQU and WLQU as functions of ϵ for various values of g at x = 1.2.

Fig. 4.  

Evolution of (a) LQU and (b) WLQU for suitable parameter of B, where T = 1 for different values of J.

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