Large-amplitude coherent-state superposition generated by a time-separated two-photon subtraction from a continuous-wave squeezed vacuum

被引：34
|
作者：
Takeoka, Masahiro [1 ,2 ]
Takahashi, Hiroki [1 ,2 ,3 ]
Sasaki, Masahide [1 ,2 ]
机构：
[1] Natl Inst Informat & Commun Technol, Tokyo 1848795, Japan
[2] Japan Sci & Technol Agcy, CREST, Chiyoda Ku, Tokyo 1020075, Japan
[3] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
来源：
PHYSICAL REVIEW A | 2008年 / 77卷 / 06期
关键词：
D O I：
10.1103/PhysRevA.77.062315
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A theoretical analysis is given for a two-photon subtraction from a continuous-wave squeezed vacuum with finite time separation between two detection events. In the cw photon subtraction process, generated states are inevitably described by temporal multimode states. Our approach is based on analytical formulas that are mathematically simple and provide an intuitive understanding of the multimode structure of the system. We show that, in our process, the photon-subtracted squeezed vacuum is generated in two temporal modes and one of these modes acts as an ancillary mode to make the other one a large-amplitude coherent-state superposition.
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页数：9
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