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International Journal of Theoretical Physics

, Volume 53, Issue 9, pp 3219–3225 | Cite as

Quantum Fisher Information of Several Qubitsin the Superposition of A GHZ and two W Stateswith Arbitrary Relative Phase

  • Fatih Ozaydin
  • Azmi Ali Altintas
  • Sinan Bugu
  • Can Yesilyurt
  • Metin Arik
Article

Abstract

We study the quantum Fisher information (QFI) of a system of several particles which is in a superposition of a GHZ and two W states with arbitrary relative phase. We show that as the number of particles increases from 3 to 4, the behavior of QFI drastically changes. We also show how the dependence of QFI on the relative phase weakens as the number of particles increases. We also analyze the QFI for the state for several instances of N due to the change of the relative phases.

Keywords

Quantum Fisher information GHZ states W states Heisenberg limit 

Notes

Acknowledgments

This work was funded by Isik University Scientific Research Fund, Grant Number: BAP-14A101.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Fatih Ozaydin
    • 1
  • Azmi Ali Altintas
    • 2
  • Sinan Bugu
    • 3
  • Can Yesilyurt
    • 4
  • Metin Arik
    • 5
    • 6
  1. 1.Department of Information Technologies, Faculty of Science and LettersIsik UniversityIstanbulTurkey
  2. 2.Department of Electrical Engineering, Faculty of Engineering and ArchitectureOkan UniversityIstanbulTurkey
  3. 3.Department of Computer Engineering, Institute of ScienceIstanbul UniversityIstanbulTurkey
  4. 4.Department of Computer Engineering, Faculty of Engineering and ArchitectureOkan UniversityIstanbulTurkey
  5. 5.Physics Department, Faculty of Science and LettersBogazici UniversityIstanbulTurkey
  6. 6.Department of Physics, Faculty of Science and LettersIsik UniversityIstanbulTurkey

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