Experimental Quantification of the Entanglement of Noisy Twin Beams

被引：10
|
作者：
Michalek, Vaclav [1 ]
Perina, Jan, Jr. [1 ]
Haderka, Ondrej [2 ]
机构：
[1] Palacky Univ, Fac Sci, Joint Lab Opt Palacky Univ & Inst Phys CAS, 17 Listopadu 50A, Olomouc 77146, Czech Republic
[2] Acad Sci Czech Republ, Inst Phys, Joint Lab Opt Palacky Univ & Inst Phys CAS, 17 Listopadu 12, Olomouc 77207, Czech Republic
来源：
PHYSICAL REVIEW APPLIED | 2020年 / 14卷 / 02期
关键词：
SEPARABILITY CRITERION; NONCLASSICALITY; STATES;
D O I：
10.1103/PhysRevApplied.14.024003
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Gradual loss of the entanglement of a twin beam containing around 25 photon pairs with the increasing external noise is experimentally investigated. The entanglement is quantified by the nonclassicality depths and the nonclassicality counting parameters related to several nonclassicality criteria. The reduction of intensity moments of the analyzed multimode twin beams to single-mode ones allows determination of the negativity as another quantifier of the entanglement. Both the raw photocount histograms and the reconstructed photon-number distributions are analyzed in parallel.
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页数：8
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