Quantum Fisher Information of N Particles in the Superposition of W and GHZ States

We investigate the quantum Fisher information of a multipartite entangled state of N particles in a superposition of W and GHZ states. We find that the mean quantum Fisher information per particle (RMQFI) decreases with respect to the number of the particles and the peak is observed between 0.6 and...

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Bibliographic Details
Published in:International journal of theoretical physics 2013-09, Vol.52 (9), p.2977-2980
Main Authors: Ozaydin, Fatih, Altintas, Azmi Ali, Bugu, Sinan, Yesilyurt, Can
Format: Article
Language:English
Subjects:
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
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Summary:We investigate the quantum Fisher information of a multipartite entangled state of N particles in a superposition of W and GHZ states. We find that the mean quantum Fisher information per particle (RMQFI) decreases with respect to the number of the particles and the peak is observed between 0.6 and 0.8 values of the superposition coefficient of W state. We present the behavior of RMQFI for N from 2 to 10 and discuss some interesting results.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-013-1588-1