Fusing multiple W states simultaneously with a Fredkin gate

Yükleniyor...
Küçük Resim

Tarih

2014-04-14

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

American Physical Society

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Araştırma projeleri

Organizasyon Birimleri

Dergi sayısı

Özet

We propose an optical scheme to prepare large-scale entangled networks of W states. The scheme works by simultaneously fusing three polarization-encoded W states of arbitrary size via accessing only one qubit of each W state. It is composed of a Fredkin gate (controlled-swap gate), two fusion gates [as proposed in S. K. Ozdemir et al., New J. Phys. 13, 103003 (2011)], and an H-polarized ancilla photon. Starting with three n-qubit W states, the scheme prepares a new W state with 3(n - 1) qubits after postselection if both fusion gates operate successfully, i.e., a fourfold coincidence at the detectors. The proposed scheme reduces the cost of creating arbitrarily large W states considerably when compared to previously reported schemes.

Açıklama

Anahtar Kelimeler

Quantum secure communication, Cluster states, Graph states, Bell states, Entanglement

Kaynak

Physical Review A

WoS Q Değeri

Q1

Scopus Q Değeri

N/A

Cilt

89

Sayı

4

Künye

Özaydın, F., Buğu, S., Yeşilyurt, C., Altıntaş, A. A., Tame, M. & Özdemir, S. (2014). Fusing multiple W states simultaneously with a fredkin gate. Physical Review A, 89(4), 1-7. doi:10.1103/PhysRevA.89.042311