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Symmetry
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Feature Papers in 'Physics' Section 2025
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Feature Papers in 'Physics' Section 2025

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

Deadline for manuscript submissions: 31 January 2026 | Viewed by 1830

Special Issue Editors

Prof. Dr. Stefano Profumo

E-Mail Website
Guest Editor
Department of Physics, University of California, Santa Cruz, CA 94720, USA
Interests: astro-particle physics; particle dark matter searches and model building; high energy astrophysics; theoretical high energy physics; particle physics beyond the standard model; models for the generation of the matter-antimatter asymmetry in the universe; phenomenology of supersymmetric and extra-dimensional models
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Alberto Ruiz-Jimeno

E-Mail Website
Guest Editor
Instituto de Física de Cantabria, Universidad de Cantabria, Avenida de los Castros, s/n, E-39005 Santander, Spain
Interests: particle physics; high energy physics; physics; doctoral education; outreach
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to announce the launch of a new Special Issue, “Feature Papers in 'Physics' Section 2025”, online. We aim to introduce new insights into scientific developments or cutting-edge technology related to the physics and symmetry field, which are expected to make a great contribution to the community. This issue will cover topics, original research, and peer-reviewed articles pertaining to the latest research and developments in any field of physics where symmetry plays a key role.

This Special Issue will serve as a platform for researchers to publish their scientific work, helping them to influence the scientific community as well as the general public.

Prof. Dr. Stefano Profumo
Prof. Dr. Alberto Ruiz-Jimeno
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 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

  • symmetry in mathematical physics
  • local and global symmetries
  • continuous symmetries
  • spacetime symmetries
  • discrete symmetries and their tests
  • conservation laws and their tests
  • gauge theories
  • lie groups
  • relativity and tests of Lorentz invariance
  • spontaneous symmetry breaking
  • crystal symmetry
  • conformal symmetry
  • chiral symmetry and chiral symmetry breaking
  • dynamical symmetry breaking models
  • flavor symmetries
  • symmetries in condensed matter
  • infinite-dimensional symmetries
  • quantum group symmetries
  • baryon and lepton number
  • crystalline systems and their symmetries
  • symmetries in models for physics beyond the Standard Model
  • scaling laws of complex system

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • Reprint: MDPI Books provides the opportunity to republish successful Special Issues in book format, both online and in print.

Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

20 pages, 1554 KiB  
Article
Structure of Odd-A Ag Isotopes Studied via Algebraic Approaches
by Stanimir Kisyov and Stefan Lalkovski
Symmetry 2025, 17(8), 1276; https://doi.org/10.3390/sym17081276 - 8 Aug 2025
Viewed by 83
Abstract
The structure of the odd-A silver isotopes Ag103–115 is discussed within the frame of the interacting boson–fermion model (IBFM). An overview of their key properties is presented, with a particular attention paid to the “J-1 anomaly”, represented [...] Read more.
The structure of the odd-A silver isotopes Ag103–115 is discussed within the frame of the interacting boson–fermion model (IBFM). An overview of their key properties is presented, with a particular attention paid to the “J-1 anomaly”, represented by an abnormal ordering of the lowest 7/2+ and 9/2+ states. By examining previously published data and newly performed calculations, it is demonstrated that the experimentally known level schemes and electromagnetic properties of Ag103–115 can be reproduced well within IBFM-1 by using a consistent set of model parameters. The contribution of different single-particle orbitals to the structure of the lowest-lying excited nuclear states in Ag103–115 is discussed. Given that the J-1 anomaly brings down the 7/2+ level from the j−3 multiplet to energies, which can be thermally populated in hot stellar environments, the importance of low-lying excited states in odd-A silver isotopes for astrophysical processes is outlined. Full article
(This article belongs to the Special Issue Feature Papers in 'Physics' Section 2025)
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8 pages, 342 KiB  
Article
Should the Evolution of Our Universe Be Treated as an Initial Value Problem?
by Martin Tamm
Symmetry 2025, 17(8), 1258; https://doi.org/10.3390/sym17081258 - 7 Aug 2025
Viewed by 151
Abstract
In classical physics, the traditional way to handle dynamics is to work with initial value problems: Specifying all variables and their time-derivatives at a certain time will, together with the equations of motion, give the state of the system at any time. In [...] Read more.
In classical physics, the traditional way to handle dynamics is to work with initial value problems: Specifying all variables and their time-derivatives at a certain time will, together with the equations of motion, give the state of the system at any time. In this paper, it is questioned whether this is the right way to treat cosmology. The main reason is that cosmology, as opposed to almost all other parts of physics, deals with genuinely global problems. The main example in this paper will be the accelerating expansion. It is not claimed that the model studied here gives any kind of final explanation of this phenomenon. Nevertheless, it shows that what is commonly interpreted as the result of some dark energy, could instead be the result of a global condition for the universe. This model cannot be treated as a classical initial value problem. But an interesting additional property is that it can explain why the rate of acceleration now seems to be decreasing with time. Full article
(This article belongs to the Special Issue Feature Papers in 'Physics' Section 2025)
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13 pages, 302 KiB  
Article
Unveiling the Role of Vector Potential in the Aharonov–Bohm Effect
by Masashi Wakamatsu
Symmetry 2025, 17(6), 935; https://doi.org/10.3390/sym17060935 - 12 Jun 2025
Viewed by 539
Abstract
The most popular interpretation of the Aharonov–Bohm (AB) effect is that the electromagnetic potential locally affects the complex phase of a charged particle’s wave function in the magnetic field free region. However, since the vector potential is a gauge-variant quantity, multiple researchers suspect [...] Read more.
The most popular interpretation of the Aharonov–Bohm (AB) effect is that the electromagnetic potential locally affects the complex phase of a charged particle’s wave function in the magnetic field free region. However, since the vector potential is a gauge-variant quantity, multiple researchers suspect that it is just a convenient tool for calculating the force field. This motivates them to explain the AB effect without using the vector potential, which inevitably leads to some sort of non-locality. This frustrating situation is shortly summarized by the statement by Aharonov et al. that the AB effect may be due to a local gauge potential or due to non-local gauge-invariant fields. In the present paper, we shall give several convincing arguments which support the viewpoint that the vector potential is not just a convenient mathematical tool with little physical entity. Despite its gauge arbitrariness, the vector potential certainly contains a gauge-invariant piece, which solely explains the observed AB phase shift. Importantly, this component has a property such that it is basically unique and cannot be eliminated by any regular gauge transformations. To complete the discussion, we also discuss the role of remaining gauge arbitrariness still contained in the entire vector potential. Full article
(This article belongs to the Special Issue Feature Papers in 'Physics' Section 2025)
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19 pages, 3412 KiB  
Article
Neutron Stars in the Theory of Gravity with Non-Minimal Derivative Coupling and Realistic Equations of State
by Pavel E. Kashargin, Alexander A. Lebedev and Sergey V. Sushkov
Symmetry 2025, 17(6), 910; https://doi.org/10.3390/sym17060910 - 9 Jun 2025
Viewed by 465
Abstract
We numerically construct compact stars in the scalar–tensor theory of gravity with non-minimal derivative coupling of a scalar field to the curvature and nonzero cosmological constant. There are two free parameters in this model of gravity: the non-minimal derivative coupling parameter ℓ and [...] Read more.
We numerically construct compact stars in the scalar–tensor theory of gravity with non-minimal derivative coupling of a scalar field to the curvature and nonzero cosmological constant. There are two free parameters in this model of gravity: the non-minimal derivative coupling parameter ℓ and the cosmological constant parameter ξ. We study the relationship between the model parameters and characteristic of the neutron star, which allowed us to limit the permissible range of ξ and ℓ. In particular, in the case ξ=−1, the external geometry of the neutron star coincides with the Schwarzschild–anti-de Sitter geometry, while the internal geometry of the star differs from the case of the standard gravity theory. Many realistic equations of the state of neutron star matter were considered. In general, the neutron star model in the theory of gravity with a non-minimal derivative coupling does not contradict astronomical data and is viable. Full article
(This article belongs to the Special Issue Feature Papers in 'Physics' Section 2025)
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