Characterization of a π-phase shift quantum gate for coherent-state qubits

被引：14

作者：

Blandino, Remi ^{[1
]}

Ferreyrol, Franck ^{[1
]}

Barbieri, Marco ^{[1
]}

Grangier, Philippe ^{[1
]}

Tualle-Brouri, Rosa ^{[1
,2
]}

机构：

[1] Univ Paris 11, CNRS, Inst Opt, Grp Opt Quant,Lab Charles Fabry, F-91127 Palaiseau, France

[2] Inst Univ France, F-75005 Paris, France

来源：

NEW JOURNAL OF PHYSICS | 2012年 / 14卷

关键词：

INFORMATION; COMPUTATION; LIGHT;

D O I：

10.1088/1367-2630/14/1/013017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We discuss the characterization of a pi-phase shift quantum gate acting on a qubit encoded in superpositions of coherent states. We adopt a technique relying on some a priori knowledge about the physics underlying the functioning of the device. A parameter summarizing the global quality of the quantum gate is obtained by 'virtually' processing an entangled state. With such an approach, we can facilitate the characterization of our gate, focusing on the useful subspace rather than on the entire phase space.

引用

页数：9

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