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Symmetries in Applied and Theoretical Physics Selected Papers from the...
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Symmetries in Applied and Theoretical Physics Selected Papers from the “12th BPU Congress”

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

Deadline for manuscript submissions: 31 December 2025 | Viewed by 1058

Special Issue Editors

Prof. Dr. Dumitru Chirlesan

E-Mail Website
Guest Editor
Department of Environmental Engineering and Applied Engineering Sciences, University Center of Pitesti, National University for Science and Technology Politehnica Bucuresti, 110040 Pitesti, Romania
Interests: advanced materials; powder technology; with a focus on material characterization; mechanical testing and heat treatment
Dr. Iulian Petrisor

E-Mail Website
Guest Editor
Department of Physics, University of Craiova, 13 A.I. Cuza, 200585 Craiova, Romania
Interests: theoretical and computational methods in plasma physics; the main research contributions concern the diffusion of magnetic field lines, of electron and ions in tokamak, zonal flow generation and turbulence phenomena in tokamak plasma
Dr. Emel Sokullu

E-Mail Website
Guest Editor
1. Koç University Research Centre for Translational Medicine (KUTTAM), Koç University, Rumeli Feneri, Sariyer, Istanbul 34450, Turkey
2. Biophysics Department, Koç University School of Medicine, Rumeli Feneri, Sariyer, Istanbul 34450, Turkey
Interests: tissue/surface interactions; biocompatible materials; 3D organ-on-a-chip platforms; magnetic levitation and optical/optogenetic biophysical experiments on organoid models; effects of space radiation on tissues

Special Issue Information

Dear Colleagues,

This Special Issue will include high-quality research papers presented on-site or online at the 12th Congress of the Balkan Physical Union (12 BPU Congress). The congress will be held in Bucharest, Romania, on July 8–12, 2025. The venue is the National University for Science and Technology “Politehnica” and registration can be carried out at https://bpu12.ucv.ro/. This Special Issue will consider papers included in the program of the 12 BPU Congress that cover one of the following topics:

  • Symmetries in Atomic, Molecular and Optical Physics;
  • Biophysics, Life Sciences and Medical Physics;
  • Condensed Matter Physics and Phase Transitions;
  • Environmental and Solar Physics, Meteorology and Geophysics;
  • Mathematical and Theoretical Physics;
  • Astrophysics, Gravitation and Cosmology;
  • Nuclear Physics, Energy Science and Technology, Accelerators and Beams;
  • Plasma, Statistical and Nonlinear Physics;
  • Symmetries in Quantum Physics.

Prof. Dr. Dumitru Chirlesan
Dr. Iulian Petrisor
Dr. Emel Sokullu
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). Symmetry provides sponsorship to cover fee for select articles. 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

  • symmetries and conservation laws in nature
  • mathematical and computational methods in physics
  • nonlinear and complex phenomena
  • physics and energy
  • quantum science and technology

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

Published Papers (3 papers)

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Research

18 pages, 2176 KB  
Article
Reflectivity Evolution and Preplasma Expansion in Front of Periodic and Flat Tilted Targets Under Laser Prepulse Influence
by Marina Cuzminschi and Alexei Zubarev
Symmetry 2025, 17(11), 1873; https://doi.org/10.3390/sym17111873 - 5 Nov 2025
Abstract
In this article, we compare laser prepulse interactions with flat and periodic 1D grating aluminum targets. We describe the cases of normal and oblique radiation incidence. The choice of an appropriate radiation incidence angle and target geometry reduces back-reflection and increases the performance [...] Read more.
In this article, we compare laser prepulse interactions with flat and periodic 1D grating aluminum targets. We describe the cases of normal and oblique radiation incidence. The choice of an appropriate radiation incidence angle and target geometry reduces back-reflection and increases the performance of laser-driven experiments due to more uniform target heating. We studied preplasma generation in front of the targets and described its temporal evolution for different angles of radiation incidence. The electron density has a symmetric periodic distribution in front of grating targets and an irregular distribution in front of flat targets. It varies from 0.3×1022cm−3 to 3.5×1022cm−3 for grating targets, and from 1×1022cm−3 to 2.5×1022cm−3 for flat targets. The generation of overcritical density regions occurs before the end of the prepulse stage. We developed a semi-analytical model based on the effective refractive index and Bloch wave approximation to describe changes in reflectivity during the simulations. During the preplasma expansion, the reflectivity varies from 0.1 to 0.8. The numerical simulation results align well with the analytically predicted behavior of the preplasma–target ensemble. Grating targets are more suitable for experiments compared with flat ones. The most convenient angle of radiation incidence is about 15°. Full article
(This article belongs to the Special Issue Symmetries in Applied and Theoretical Physics Selected Papers from the “12th BPU Congress”)
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19 pages, 1620 KB  
Article
Secure Quantum Teleportation of Squeezed Thermal States
by Alexei Zubarev, Marina Cuzminschi and Aurelian Isar
Symmetry 2025, 17(11), 1804; https://doi.org/10.3390/sym17111804 - 26 Oct 2025
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Abstract
Quantum teleportation is a fundamental protocol in quantum information science. It represents a critical resource for quantum communication and distributed quantum computing. We derive an analytical expression of the fidelity of teleportation of an input squeezed thermal state using for teleportation a bipartite [...] Read more.
Quantum teleportation is a fundamental protocol in quantum information science. It represents a critical resource for quantum communication and distributed quantum computing. We derive an analytical expression of the fidelity of teleportation of an input squeezed thermal state using for teleportation a bipartite Gaussian resource state shared between Alice and Bob. Each mode of the resource state is susceptible to the influence of the environment. We employ the characteristic function approach in conjunction with the covariance matrix formalism. The fidelity of teleportation is expressed in terms of input and resource state covariance matrices. We investigate, as an example, the feasibility of secure quantum teleportation of a squeezed thermal state using a two-mode resource state whose modes are placed in separate thermal baths. A successful quantum teleportation requires meeting two criteria: the presence of two-way quantum steering and a teleportation fidelity exceeding the classical threshold. The quantum steering is by nature asymmetric and has found applications in quantum cryptography and secure quantum teleportation. Weak squeezing and a high number of average thermal photons in the input states lead to an increase in the fidelity of teleportation. Generally, steering disappears much faster than the fidelity of teleportation decreases below its classical limit. Full article
(This article belongs to the Special Issue Symmetries in Applied and Theoretical Physics Selected Papers from the “12th BPU Congress”)
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20 pages, 285 KB  
Article
The Role of Symmetry Aspects in Considering the Spin-1 Particle with Two Additional Electromagnetic Characteristics in the Presence of Both Magnetic and Electric Fields
by Alina Ivashkevich, Viktor Red’kov, Elena Ovsiyuk and Alexander Chichurin
Symmetry 2025, 17(9), 1465; https://doi.org/10.3390/sym17091465 - 5 Sep 2025
Viewed by 384
Abstract
In this paper, we study a generalized Duffin–Kemmer equation for a spin-1 particle with two characteristics, anomalous magnetic moment and polarizability in the presence of external uniform magnetic and electric fields. After separating the variables, we obtained a system of 10 first-order partial [...] Read more.
In this paper, we study a generalized Duffin–Kemmer equation for a spin-1 particle with two characteristics, anomalous magnetic moment and polarizability in the presence of external uniform magnetic and electric fields. After separating the variables, we obtained a system of 10 first-order partial differential equations for 10 functions fA(r,z). To resolve this complicated problem, we first took into account existing symmetry in the structure of the derived system. The main step consisted of applying a special method for fixing the r-dependence of ten functions fA(r,z),A=1,…,10. We used the approach of Fedorov–Gronskiy, according to which the complete 10-component wave function is decomposed into the sum of three projective constituents. The dependence of each component on the polar coordinate r is determined by only one corresponding function, Fi(r),i=1,2,3. These three basic functions are constructed in terms of confluent hypergeometric functions, and in this process a quantization rule arises due to the presence of a magnetic field.In fact, this approach is a step-by-step algebraization of the systems of equations in partial derivatives. After that, we derived a system of 10 ordinary differential equations for 10 functions fA(z). This system was solved using the elimination method and with the help of special linear combinined with the involved functions. As a result, we found three separated second-order differential equations, and their solutions were constructed in the terms of the confluent hypergeometric functions. Thus, in this paper, the three types of solutions for a vector particle with two additional electromagnetic characteristics in the presence of both external uniform magnetic and electric fields. Full article
(This article belongs to the Special Issue Symmetries in Applied and Theoretical Physics Selected Papers from the “12th BPU Congress”)
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