Change search
ReferencesLink to record
Permanent link

Direct link
Maximally polarized states for quantum light fields
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.ORCID iD: 0000-0002-2082-9583
2007 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 76, no 4Article in journal (Refereed) Published
Abstract [en]

The degree of polarization of a quantum field can be defined as its distance to an appropriate set of states. When we take unpolarized states as this reference set, the states optimizing this degree for a fixed average number of photons (N) over bar present a fairly symmetric, parabolic photon statistic, with a variance scaling as (N) over bar (2). Although no standard optical process yields such a statistic, we show that, to an excellent approximation, a highly squeezed vacuum can be taken as maximally polarized. We also consider the distance of a field to the set of its SU(2) transformed, finding that certain linear superpositions of SU(2) coherent states make this degree to be unity.

Place, publisher, year, edition, pages
2007. Vol. 76, no 4
Keyword [en]
polarimetric contrast parameters, hilbert-schmidt distance, unpolarized radiation, entanglement measures, squeezed-light, atomic states, optical waves, information, entropy, fluctuations
URN: urn:nbn:se:kth:diva-17089DOI: 10.1103/PhysRevA.76.043820ISI: 000250619700189ScopusID: 2-s2.0-35348916062OAI: diva2:335132
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Björk, Gunnar
By organisation
Microelectronics and Applied Physics, MAP
In the same journal
Physical Review A. Atomic, Molecular, and Optical Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 14 hits
ReferencesLink to record
Permanent link

Direct link