Frequency indistinguishibility investigation of generated coincident-frequency entanglement via ultra-fast pulsed sources

NTSC-IR

	Frequency indistinguishibility investigation of generated coincident-frequency entanglement via ultra-fast pulsed sources
	Zhang Yu 1; Quan RunAi 1; Bai Yun 1; Hou FeiYan 1; Liu Tao1 ; Zhang ShouGang1 ; Dong RuiFang 1
	2013
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	62 期号:14
摘要	The frequency entangled biphoton source generated via spontaneous parametric down-conversion process (SPDC) has found numerous applications in quantum information processing and relevant fields. We report on an experimental generation of coincident-frequency entanglement from periodically poled potassium titanyl phosphate, pumped by an ultra-short pulsed optical source with duration less than 20 fs. Based on the Hong-Ou-Mandel interferometric coincidence measurement setup, a visibility of about 42% is demonstrated, which indicates degraded frequency indistinguishibility of the down-converted biphotons. Through theoretical investigation, such a degradation can be perfectly explained by the nonnegligible second-order dispersion terms in the Taylor-expanded phase mismatching function for the case of ultra-broadband spectrum of the pulsed pump. The fitting to the experimental results is further used and perfect agreement is achieved. The results imply that the spectral bandwidth of the pump can affect the generated coincident-frequency entanglement.
关键词	QUANTUM CRYPTOGRAPHY KTIOPO4 PHOTONS STATE TELEPORTATION RESOLUTION coincident-frequency entanglement Hong-Ou-Mandel interferometric measurement coincidence counts
语种	英语
资助项目	[State Key Scientific Instruments and Equipment Development Program of China] ; [National Natural Science Foundation of China] ; [Key Fund for the "Western Light" Talent Cultivation Plan of the Chinese Academy of Sciences] ; [Fund for the Scientific and Technical Innovation "Cross and Cooperation Team" of the Chinese Academy of Sciences] ; [State Key Laboratory of Transient Optics and Photonics, China]
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13379
专题	中国科学院国家授时中心
作者单位	1.中国科学院国家授时中心 2.中国科学院大学
第一作者单位	中国科学院国家授时中心
推荐引用方式 GB/T 7714	Zhang Yu,Quan RunAi,Bai Yun,et al. Frequency indistinguishibility investigation of generated coincident-frequency entanglement via ultra-fast pulsed sources[J]. ACTA PHYSICA SINICA,2013,62(14).
APA	Zhang Yu.,Quan RunAi.,Bai Yun.,Hou FeiYan.,Liu Tao.,...&Dong RuiFang.(2013).Frequency indistinguishibility investigation of generated coincident-frequency entanglement via ultra-fast pulsed sources.ACTA PHYSICA SINICA,62(14).
MLA	Zhang Yu,et al."Frequency indistinguishibility investigation of generated coincident-frequency entanglement via ultra-fast pulsed sources".ACTA PHYSICA SINICA 62.14(2013).