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


Ozaydin F., Altintas A. A. , Bugu S., Yesilyurt C.

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS, vol.52, no.9, pp.2977-2980, 2013 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 52 Issue: 9
  • Publication Date: 2013
  • Doi Number: 10.1007/s10773-013-1588-1
  • Journal Name: INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.2977-2980
  • Keywords: Quantum Fisher information, N qubit state, W State, GHZ State

Abstract

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.