Experimental realization of macroscopic coherence by phase-covariant cloning of a single photon

被引：49
作者：
Nagali, Eleonora [1 ]
De Angelis, Tiziano [1 ]
Sciarrino, Fabio [1 ,2 ]
De Martini, Francesco [1 ]
机构：
[1] Univ Roma La Sapienza, Dipartimento Fis, Consorzio Nazionale Interuniv Sci Fis Materia, I-00185 Rome, Italy
[2] Ctr Studi Ricerche Enrico Fermi, I-00184 Rome, Italy
来源：
PHYSICAL REVIEW A | 2007年 / 76卷 / 04期
关键词：
D O I：
10.1103/PhysRevA.76.042126
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the multiphoton states generated by high-gain optical parametric amplification of a single injected photon, polarization encoded as a "qubit." The experiment configuration exploits the optimal phase-covariant cloning in the high gain regime. The interference fringe pattern showing the nonlocal transfer of coherence between the injected qubit and the mesoscopic amplified output field involving up to 4000 photons has been investigated. A probabilistic method to extract full information about the multiparticle output wave function has been implemented.
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页数：6
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