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Symmetry
Special Issues
Symmetry and Asymmetry in Photonics: Theory and Emerging Practice
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Symmetry and Asymmetry in Photonics: Theory and Emerging Practice

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Computer".

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 1719

Special Issue Editor

Dr. Eusebio Bernabeu

E-Mail Website
Guest Editor
Physics Faculty, Universidad Complutense de Madrid, 28040 Madrid, Spain
Interests: optical metrology; sensors and actuators; special lighting; optical engineering; quantum optics; interferometric and diffractive devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Symmetry invites you to contribute your original research work and review articles on “Symmetry and Asymetry in Photonics: Theory and Emerging Practice” that either advance the state-of-the-art of mathematical methods (geometrycal configurations in new dressings), or theoretical or experimental studies that extend the bounds of the existing methodologies to new contributions related to the symmetry and/or asymmetry properties. Topics of interest include the following: new photonics crystals configuration, LEDs and OLEDs, LDs, IR and V nano-anntenas and detectors, new polarizers, structured light beams, optoelectronic devices (modulators and switchers), among others.

We hope that this Issue will provide an overall picture and up-to-date findings for readers of the scientific community, which ultimately benefit the industrial sector regarding its specific market niches and end users.

Prof. emer Eusebio Bernabeu
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Photonics
  • Symmetry and asymetry
  • New photonics crystals configuration
  • LEDs and OLEDs
  • LDs
  • IR and V nano-anntenas
  • New polarizers
  • Structured light beams
  • Optoelectronic devices.

Published Papers (1 paper)

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Research

15 pages, 702 KiB  
Article
Sources of Asymmetry and the Concept of Nonregularity of n-Dimensional Density Matrices
by José J. Gil
Symmetry 2020, 12(6), 1002; https://doi.org/10.3390/sym12061002 - 12 Jun 2020
Cited by 6 | Viewed by 1402
Abstract
The information contained in an n-dimensional (nD) density matrix ρ is parametrized and interpreted in terms of its asymmetry properties through the introduction of a family of components of purity that are invariant with respect to arbitrary rotations of the [...] Read more.
The information contained in an n-dimensional (nD) density matrix ρ is parametrized and interpreted in terms of its asymmetry properties through the introduction of a family of components of purity that are invariant with respect to arbitrary rotations of the nD Cartesian reference frame and that are composed of two categories of meaningful parameters of different physical nature: the indices of population asymmetry and the intrinsic coherences. It is found that the components of purity coincide, up to respective simple coefficients, with the intrinsic Stokes parameters, which are also introduced in this work, and that determine two complementary sources of purity, namely the population asymmetry and the correlation asymmetry, whose weighted square average equals the overall degree of purity of ρ. A discriminating decomposition of ρ as a convex sum of three density matrices, viz. the pure, the fully random (maximally mixed) and the discriminating component, is introduced, which allows for the definition of the degree of nonregularity of ρ as the distance from ρ to a density matrix of a system composed of a pure component and a set of 2D, 3D,… and nD maximally mixed components. The chiral properties of a state ρ are analyzed and characterized from its intimate link to the degree of correlation asymmetry. The results presented constitute a generalization to nD systems of those established and exploited for polarization density matrices in a series of previous works. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Photonics: Theory and Emerging Practice)
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