Heralded single-photon source based on superpositions of squeezed states

被引：0
|
作者：
Azuma, Hiroo [1 ]
Munro, William J. [2 ]
Nemoto, Kae [1 ,2 ]
机构：
[1] Natl Inst Informat, Global Res Ctr Quantum Informat Sci, 2-1-2 Hitotsubashi, Chiyoda Ku, Tokyo 1018430, Japan
[2] Okinawa Inst Sci & Technol Grad Univ, Onna, Okinawa 9040495, Japan
来源：
PHYSICAL REVIEW A | 2024年 / 109卷 / 05期
关键词：
QUANTUM; GENERATION;
D O I：
10.1103/PhysRevA.109.053711
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a heralded single-photon source based on injecting a superposition of oppositely squeezed states onto a beam splitter. Our superposition of squeezed states is composed of only even photon number states (the number of photons is equal to 2, 6, 10, ...) meaning the probability for an emitted single photon given as a heralded single-photon event is higher than what one can achieve from the usual two-mode squeezed state. This enables one to realize an enhanced heralded single-photon source. We discuss how to create this superposition of squeezed states utilizing a single-mode squeezed state and the cross-Kerr nonlinearity. Our proposed method significantly improves the probability of emitting the heralded single photon compared to spontaneous parametric down-conversion.
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页数：8
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