Symmetry in Field Theory, Gravitation and Cosmology

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

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 1581

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Institute for Nuclear Problems, Belarusian State University, 220030 Minsk, Belarus
Interests: quantum theory; gravity, cosmology; dark energy problem; black holes physics (quantum aspects)
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Special Issue Information

Dear Colleagues,

Symmetry plays an important role in fundamental physics. This was already clear in the last century. All major scientific breakthroughs were made on the basis of this concept. Approaches within this paradigm have been changing over time (in particular, global symmetry in many cases gave way to local symmetry), but the fundamental principle (different symmetries and their breaking are the key to understanding processes in the Universe) remains unshakable.

It is no exaggeration to say that the 20th and 21st centuries demonstrate the triumph of this principle: the development and experimental confirmation at the LHC of the standard model in high-energy physics and the confirmation at space observatories of the standard model of cosmology are the most striking facets of this triumph.

The present Special Issue is devoted to the investigation of symmetry and its breaking in field theory, (including quantum field theory), gravitation, and cosmology (including their quantum aspects).

Prof. Dr. Alexander Shalyt-Margolin
Guest Editor

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Keywords

  • QFT (including QFT in curved space-time);
  • High-energy physics beyond of standard model;
  • Gravitational models;
  • Quantum gravity and possible breaking of known symmetries;
  • Astroparticle physics;
  • Cosmological models (inflation models, cyclic models, etc.);
  • Quantum cosmology;
  • Dark side of Universe (dark energy and dark matter problems);
  • Large-scale structure of the universe;
  • Black hole physics (including quantum aspects);
  • Experimental measurements of cosmological parameters;

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Published Papers (1 paper)

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Research

24 pages, 394 KiB  
Article
Bubble Nucleation from a de Sitter–Planck Background with Quantum Boltzmann Statistics
by Davide Fiscaletti, Ignazio Licata and Fabrizio Tamburini
Symmetry 2022, 14(11), 2297; https://doi.org/10.3390/sym14112297 - 2 Nov 2022
Cited by 1 | Viewed by 1782
Abstract
Every physical theory involving quantum fields requires a model of quantum vacuum. The vacuum associated to quantum gravity must incorporate the prescriptions from both the theory of relativity and quantum physics. In this work, starting from the hypothesis of nucleation of sub-Planckian bubbles [...] Read more.
Every physical theory involving quantum fields requires a model of quantum vacuum. The vacuum associated to quantum gravity must incorporate the prescriptions from both the theory of relativity and quantum physics. In this work, starting from the hypothesis of nucleation of sub-Planckian bubbles from a de Sitter vacuum, we study the necessary conditions to obtain baby universes, black holes and particles. The de Sitter-Planck background is described by an “infinite” Quantum Boltzmann statistics that generates fermions and bosons, and manifests itself as a deformation of the geometry that leads to a generalized uncertainty principle, a unified expression for the generalized Compton wavelength and event horizon size, drawing a connection between quantum black holes and elementary particles, seen as a collective organization of the bubbles of the vacuum described by the generalized Compton wavelength. The quantum thermodynamics of black holes is then outlined and the physical history of each bubble is found to depend on the cosmological constant described in terms of thermodynamic pressure. A treatment of the Casimir effect is provided in the de Sitter-Planck background, and finally wormholes are explored as bubble coalescence processes. Full article
(This article belongs to the Special Issue Symmetry in Field Theory, Gravitation and Cosmology)
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