Demonstration of Local Expansion Toward Large-Scale Entangled Webs

被引：47

作者：

Tashima, Toshiyuki ^{[1
]}

Kitano, Tsuyoshi ^{[1
]}

Oezdemir, Sahin Kaya ^{[2
]}

Yamamoto, Takashi ^{[1
]}

Koashi, Masato ^{[1
]}

Imoto, Nobuyuki ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan

[2] Washington Univ, Dept Elect & Syst Engn, St Louis, MO 63130 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.105.210503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate an optical gate that increases the size of polarization-based W states by accessing only one of the qubits. Using this gate, we have generated three-photon and four-photon W states with fidelities 0: 836 +/- 0: 042 and 0: 784 +/- 0: 028, respectively. We also confirmed the existence of pairwise entanglement in every pair of qubits, including the one that was left untouched by the gate. The gate is applicable to any size of W states and hence is a universal tool for expanding entanglement.

引用

页数：4

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