Special Issue "Symmetry with Gravity and Particle Theories"

A special issue of Symmetry (ISSN 2073-8994).

Deadline for manuscript submissions: 30 November 2020.

Special Issue Editors

Prof. Dr. Shin'ichi Nojiri
E-Mail Website
Guest Editor
Division of Particle and Astrophysical Science Nagoya UniversityAichi Prefecture 466-8550Japan
Interests: particle cosmology; quantum field theory; gravity
Prof. Taishi Katsuragawa
E-Mail Website
Guest Editor
CCNU (Hua-Zhong Normal U.)
Interests: gravitation and cosmology

Special Issue Information

Dear Colleagues,

Symmetry is the most important guiding principle for constructing realistic theories of gravity and particles. Gauge symmetries, that is, local symmetries, play the main role in obtaining consistent quantum theories for the models of particles with a spin of greater than or equal to one, such as with gauge particles and graviton. Furthermore, gauge symmetries strongly restrict the models. On the other hand, many global symmetries appear in low-energy effective theories, although there seems to be no exact global symmetry, which is broken either spontaneously or explicitly. Low energy symmetries may also appear emergently.

In our Special Issue on “Symmetry with Gravity and Particle Theories”, we review the role of symmetries in gravity and particle theories, origins of symmetries, mechanisms of breakdown, relations between the symmetries, and other related topics.

Prof. Dr. Shin'ichi Nojiri
Prof. Taishi Katsuragawa
Guest Editors

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 papers will be 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 1400 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

  • local symmetry
  • global symmetry
  • breakdown of symmetries
  • origin of symmetries
  • emergent symmetries

Published Papers (1 paper)

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Research

Open AccessFeature PaperArticle
A Symmetry of the Einstein–Friedmann Equations for Spatially Flat, Perfect Fluid, Universes
Symmetry 2020, 12(1), 147; https://doi.org/10.3390/sym12010147 - 10 Jan 2020
Abstract
We report a symmetry property of the Einstein–Friedmann equations for spatially flat Friedmann–Lemaître–Robertson–Walker universes filled with a perfect fluid with any constant equation of state. The symmetry transformations form a one-parameter Abelian group. Full article
(This article belongs to the Special Issue Symmetry with Gravity and Particle Theories)

Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Symmetry restoration and breaking at finite temperature (tentative)
Author: Eibun Senaha Email: [email protected]
Abstract: Symmetries at finite temperature are of great importance to understand dynamics of spontaneous symmetry breaking phenomena, especially phase transitions in early Universe. Some symmetries such as electroweak symmetry can be restored in hot environment. However, it is a nontrivial question that the phase transition occurs via first or second order, or even smooth crossover, which strongly depends on underlying physics. If it is first order, gravitational waves can be generated, providing a detectable signal of this epoch. Moreover, under some conditions, the baryon asymmetry of the Universe can also arise. In this article, the electroweak phase transition is reviewed, focusing particularly on the case of the first-order transition. Much attention is paid to multi-step phase transitions that broaden the possibilities of the first-order phase transition. In ordinary calculations, perturbative expansion breaks down at high temperature due to bad infrared behaviors. A standard prescription called thermal resummation is reviewed in some detail. We also cover a longstanding problem of gauge dependence that exists in perturbative calculations and a recent attempt to solve it.
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