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, cilt.52, sa.9, ss.2977-2980, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 9
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1007/s10773-013-1588-1
  • Dergi Adı: INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2977-2980
  • Anahtar Kelimeler: Quantum Fisher information, N qubit state, W State, GHZ State
  • İstanbul Üniversitesi Adresli: Hayır

Özet

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.