Maximally polarized states for quantum light fields
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
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
polarimetric contrast parameters, hilbert-schmidt distance, unpolarized radiation, entanglement measures, squeezed-light, atomic states, optical waves, information, entropy, fluctuations
IdentifiersURN: urn:nbn:se:kth:diva-17089DOI: 10.1103/PhysRevA.76.043820ISI: 000250619700189ScopusID: 2-s2.0-35348916062OAI: oai:DiVA.org:kth-17089DiVA: diva2:335132
QC 201005252010-08-052010-08-05Bibliographically approved