Generating multi-photon W-like states for perfect quantum teleportation and superdense coding
Yükleniyor...
Dosyalar
Tarih
2016-05-06
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer New York LLC
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
An interesting aspect of multipartite entanglement is that for perfect teleportation and superdense coding, not the maximally entangled W states but a special class of non-maximally entangled W-like states are required. Therefore, efficient preparation of such W-like states is of great importance in quantum communications, which has not been studied as much as the preparation of W states. In this paper, we propose a simple optical scheme for efficient preparation of large-scale polarization-based entangled W-like states by fusing two W-like states or expanding a W-like state with an ancilla photon. Our scheme can also generate large-scale W states by fusing or expanding W or even W-like states. The cost analysis shows that in generating large-scale W states, the fusion mechanism achieves a higher efficiency with non-maximally entangled W-like states than maximally entangled W states. Our scheme can also start fusion or expansion with Bell states, and it is composed of a polarization-dependent beam splitter, two polarizing beam splitters and photon detectors. Requiring no ancilla photon or controlled gate to operate, our scheme can be realized with the current photonics technology and we believe it enable advances in quantum teleportation and superdense coding in multipartite settings
Açıklama
Anahtar Kelimeler
Polarization-dependent beam splitter, Quantum state expansion, Quantum state fusion, W-like state, Optical microcavities, Fisher information, GHZ-State, Fusion, Entanglement, Photon
Kaynak
Quantum Information Processing
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
15
Sayı
8
Künye
Li, K., Kong, F., Yang, M., Özaydın, F., Yang, Q. & Cao, Z.-L. (2016). Generating multi-photon W-like states for perfect quantum teleportation and superdense coding. Quantum Information Processing, 15(8), 3137-3150. doi:10.1007/s11128-016-1332-x
