Generation of Large-Amplitude Coherent-State Superposition via Ancilla-Assisted Photon Subtraction

被引：209

作者：

Takahashi, Hiroki ^{[1
,2
,3
]}

Wakui, Kentaro ^{[1
,3
]}

Suzuki, Shigenari ^{[1
,3
]}

Takeoka, Masahiro ^{[1
,3
]}

Hayasaka, Kazuhiro ^{[1
,3
]}

Furusawa, Akira ^{[2
,3
]}

Sasaki, Masahide ^{[1
,3
]}

机构：

[1] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

[2] Univ Tokyo, Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[3] Japan Sci & Technol Agcy, CREST, Chiyoda Ku, Tokyo 1020075, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.101.233605

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose and demonstrate a novel method to generate a large-amplitude coherent-state superposition (CSS) via ancilla-assisted photon subtraction. The ancillary mode induces quantum interference of indistinguishable processes in an extended space, widening the controllability of quantum superposition at the conditional output. We demonstrate this by a simple time-separated two-photon subtraction from continuous wave squeezed light. We observe the largest CSS of traveling light ever reported without correcting any imperfections, which will enable various quantum information applications with CSS states.

引用

页数：4

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