Phase damping destroys quantum Fisher information of W states
Yükleniyor...
Tarih
2014-09-05
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We study the quantum Fisher information (QFI) of W states in the basic decoherence channels. We show that, as decoherence starts and increases, under i) depolarizing, QFI smoothly decays; ii) amplitude damping, QFI first exhibits a sudden drop to the shot noise level, then decreases to zero and finally increases back to the shot noise level; iii) phase damping, QFI is zero for all non-zero decoherence. We also find that on the contrary to GHZ states, QFI of W states in x and y directions are equal to each other and zero in z direction.
Açıklama
Anahtar Kelimeler
Quantum fisher information, Multipartite entanglement, W states, Decoherence channels, Cavities, Atoms, Cavity decay
Kaynak
Physics Letters, Section A: General, Atomic and Solid State Physics
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
378
Sayı
43
Künye
Özaydın, F. (2014). Phase damping destroys quantum fisher information of W states. Physics Letters A, 378(43), 3161-3164. doi:10.1016/j.physleta.2014.08.035
