Quantum degrees of polarization

OPTICS COMMUNICATIONS

卷:283

Article

Bjork, Gunnar¹  Soderholm, Jonas^1,2  Sanchez-Soto, Luis L.²  Klimov, Andrei B.³  Ghiu, Iulia⁴  Marian, Paulina⁴  Marian, Tudor A.⁴ 

[1] Royal Inst Technol KTH, Sch Commun & Informat Technol, SE-16440 Kista, Sweden

[2] Univ Complutense, Dept Opt, Fac Fis, E-28040 Madrid, Spain

[3] Univ Guadalajara, Dept Fis, Guadalajara 44420, Jalisco, Mexico

[4] Univ Bucharest, Ctr Adv Quantum Phys, R-077125 Bucharest, Romania

关键词: Polarization;    Quantum optics;    Stokes operators;    Degree of polarization;    Unpolarized states;   

DOI  :  10.1016/j.optcom.2010.04.088

来源: Elsevier

【 摘 要 】

We discuss different proposals for the degree of polarization of quantum fields. The simplest approach, namely making a direct analogy with the classical description via the Stokes operators, is known to produce unsatisfactory results. Still, we argue that these operators and their properties should be basic for any measure of polarization. We compare alternative quantum degrees and put forth that they order various states differently. This is to be expected, since, despite being rooted in the Stokes operators, each of these measures only captures certain characteristics. Therefore, it is likely that several quantum degrees of polarization will coexist, each one having its specific domain of usefulness. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free