The European Physical Journal Plus最新文献_第5页

Enhancement of quantum correlations in coupled magnomechanical systems via parametric amplifier 参量放大器增强耦合磁力系统中的量子相关性

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-20 DOI: 10.1140/epjp/s13360-025-06323-y

Mulugeta Tadesse Bedore, Tesfay Gebremariam Tesfahannes, Abdelkader Hidki, Tewodros Yirgashewa Darge, Minisha Alemu Tufa, Muhdin Abdo Wodedo, Habtamu Dagnaw Mekonnen

引用次数: 0

Towards new relativistic doubly (kappa)-deformed D = 4 quantum phase spaces 新的相对论性双(kappa) -变形D = 4量子相空间

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-20 DOI: 10.1140/epjp/s13360-025-06312-1

J. Lukierski, S. Meljanac, S. Mignemi, A. Pachoł, M. Woronowicz

{"title":"Towards new relativistic doubly (kappa)-deformed D = 4 quantum phase spaces","authors":"J. Lukierski, S. Meljanac, S. Mignemi, A. Pachoł, M. Woronowicz","doi":"10.1140/epjp/s13360-025-06312-1","DOIUrl":"10.1140/epjp/s13360-025-06312-1","url":null,"abstract":"<div>We propose new noncommutative models of quantum phase spaces, containing a pair of (kappa)-deformed Poincaré algebras, with two independent double ((kappa ,tilde{kappa }))-deformations in space-time and four-momenta sectors. The first such quantum phase space can be obtained by contractions (M,Rrightarrow infty) of recently introduced doubly (kappa)-deformed ((kappa ,tilde{kappa }))-Yang models, with the parameters M, R describing inverse space-time and four-momenta curvatures and constant four-vectors (a_mu , b_mu) determining nine types of ((kappa ,tilde{kappa }))-deformations. The second considered model is provided by the nonlinear doubly (kappa)-deformed TSR algebra spanned by 14 coset (hat{o}(1,5)/hat{o}(2)) generators. The basic algebraic difference between the two models is the following: the first one, described by (hat{o}(1,5)) Lie algebra can be supplemented by the Hopf algebra structure, while the second model contains the quantum phase space commutators ([hat{x}_mu ,hat{q}_nu ]), with the standard numerical (ihbar eta _{mu nu }) term; therefore, it describes the quantum-deformed Heisenberg algebra relations which cannot be equipped with the Hopf algebra.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06312-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On gauge fixing of the vector Schwinger model under the lens of BRST and finite field-dependent BRST formalism BRST和有限场相关BRST形式下向量Schwinger模型的规范固定

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-20 DOI: 10.1140/epjp/s13360-025-06293-1

Anisur Rahaman

{"title":"On gauge fixing of the vector Schwinger model under the lens of BRST and finite field-dependent BRST formalism","authors":"Anisur Rahaman","doi":"10.1140/epjp/s13360-025-06293-1","DOIUrl":"10.1140/epjp/s13360-025-06293-1","url":null,"abstract":"<div>The vector Schwinger model in ((1+1)) dimension is examined, with two distinct gauge-fixing terms and a gauge-fixing-like term. The gauge-fixing terms are the well-known Lorenz gauge (frac{1}{2alpha }(partial _mu A^mu )^2) and an unconventional so-called quadratic gauge-fixing (frac{1}{2alpha }(A_mu A^mu )^2). The term that looks like gauge fixing is (frac{1}{2gamma }A_mu A^mu). Given that Lorenz gauge fixing and the so-called quadratic gauge fixing are valid gauge choices, the effective theories that follow from their implementation are found to be equivalent by employing the finite field-dependent BRST formalism. Even though it seems to be the gauge-fixing terms, (frac{1}{2gamma }A_mu A^mu) cannot be considered legitimate gauge fixing even if it can eliminate the gauge redundancy. Precisely, it is a counter term that results from regularization by sacrificing gauge invariance in order to remove the singularity of the fermionic determinant that appeared during the process of bosonization. This term alters the physical content of the theory and the confining aspect of fermions.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bidirectional coupling of two single memristive Hopfield inertial neurons 两个单记忆Hopfield惯性神经元的双向耦合

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-19 DOI: 10.1140/epjp/s13360-025-06339-4

Bertrand Frederick Boui A Boya, Zeric Njitacke Tabekoueng, Lyudmila Klimentyevna Babenko, Jacques Kengne

引用次数: 0

Dynamical behaviors of a controllable memristive chaotic map 可控忆阻混沌映射的动力学行为

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-19 DOI: 10.1140/epjp/s13360-025-06387-w

Zhenhua Yu, Jia He, Xinlin Song, Feifei Yang

{"title":"Dynamical behaviors of a controllable memristive chaotic map","authors":"Zhenhua Yu, Jia He, Xinlin Song, Feifei Yang","doi":"10.1140/epjp/s13360-025-06387-w","DOIUrl":"10.1140/epjp/s13360-025-06387-w","url":null,"abstract":"<div>Nonlinear characteristics of a nonlinear system can be enhanced by adding a memristor. A magnetic flux-controlled memristor is connected to one branch of a nonlinear circuit to estimate the effect of an external magnetic field. A charge-controlled memristor is applied to one branch of a nonlinear circuit to approach the effect of an external electric field. In this paper, a simple memristive circuit is designed by using a charge-controlled memristor, a nonlinear resistor and a capacitor, and this memristive circuit is controlled by applying an external signal source. And then an equation of a simple memristive circuit and its energy function are obtained based on Kirchhoff’s law and Helmholtz’s theorem. Furthermore, a memristive map is generated by using linear transformations for the variable in oscillator equations. The dynamical behaviors of a memristive map and its characteristics of an energy adaptive regulation are investigated. The results illustrate that the dynamical behavior of a memristive chaotic map can be controlled by adjusting external signal source and parameters, and the dynamical performance of the memristive map can also be controlled by applying energy controlled parameter adaptive growth method. This controlled memristive chaotic map can further be used in image encryption algorithm.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dusty plasma sheath with non-extensive electrons and an inhomogeneous magnetic field 尘埃飞扬的等离子体鞘层，有不广泛的电子和不均匀的磁场

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-19 DOI: 10.1140/epjp/s13360-025-06368-z

Zakariae Eljabiri, Omar El Ghani, Ismael Driouch, Hassan Chatei

{"title":"Dusty plasma sheath with non-extensive electrons and an inhomogeneous magnetic field","authors":"Zakariae Eljabiri, Omar El Ghani, Ismael Driouch, Hassan Chatei","doi":"10.1140/epjp/s13360-025-06368-z","DOIUrl":"10.1140/epjp/s13360-025-06368-z","url":null,"abstract":"<div>In this paper, we analyze the impact of the non-uniform magnetic field in the sheath of a complex plasma within the framework of a non-extensive distribution of electrons ((qne 1)). Our analysis reveals that the evolution of the magnetic field profile plays a significant role in the sheath formation by influencing the electric potential, density, and velocity of plasma species, as well as the dynamics of dust particles within the sheath. Through a careful comparison of simulation data from one-dimensional fluid models between two configurations: the inhomogeneous magnetic field and the uniform one, under various values of the q-parameter, we demonstrate the necessity of considering the inhomogeneity of the magnetic field in fluid models to accurately describe the structure of the sheath. In particular, the results show that when a non-uniform magnetic field is considered, the structure of the sheath changes significantly when (q<1). For instance, the inhomogeneous magnetic field, especially at low q values, demonstrates the ability to control and confine ions within the plasma sheath, while also reducing the presence of dust grains.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new neutron area monitor with extended energy range 一种扩展能量范围的新型中子面积监测仪

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-18 DOI: 10.1140/epjp/s13360-025-06348-3

L. Russo, R. Bedogni, M. A. Caballero-Pacheco, A. I. Castro-Campoy, F. L. Frigi, A. Pietropaolo, A. Calamida, J. M. Gomez-Ros, S. Turchi, A. Allaoua, Q. Ducasse, N. Magalotti, F. Pozzi

{"title":"A new neutron area monitor with extended energy range","authors":"L. Russo, R. Bedogni, M. A. Caballero-Pacheco, A. I. Castro-Campoy, F. L. Frigi, A. Pietropaolo, A. Calamida, J. M. Gomez-Ros, S. Turchi, A. Allaoua, Q. Ducasse, N. Magalotti, F. Pozzi","doi":"10.1140/epjp/s13360-025-06348-3","DOIUrl":"10.1140/epjp/s13360-025-06348-3","url":null,"abstract":"<div>Radiation protection monitoring in installations producing high-energy neutrons requires dedicated instrumentation, called extended range neutron area monitors (ERNAM). With the main purpose of increasing the sensitivity of this class of instrument, while keeping a good degree of isotropy, a new portable device called neutron extended counter for high energy (NECH) was prototyped. NECH is based on a Helium-3 proportional counter placed in the center of a cylindrical polyethylene moderator with truncated cone ends, embedding a lead insert to promote the detection of neutrons above 20 MeV. NECH responds nearly isotropically, in terms of ambient dose equivalent H*(10), up to GeV neutrons. Its sensitivity is about three times larger than common commercial instruments of the same class. This novel instrument was fully simulated with Monte Carlo N-Particle (MCNP) and calibrated in radionuclide-based reference neutron fields at IRSN Cadarache and ENEA Frascati. Workplace testing was performed around the ENEA Frascati Neutron Generator operating at 2.5 MeV and, for the high-energy domain, at the CERN-EU high-energy Reference Field facility (CERF). This work presents the instrument, the simulated and measured dose equivalent response and the results of the workplace testing. The performance is compared with that of commercial ERNAMs.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An algebraic approach to gravitational quantum mechanics 引力量子力学的代数方法

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-18 DOI: 10.1140/epjp/s13360-025-06335-8

Won Sang Chung, Georg Junker, Hassan Hassanabadi

引用次数: 0

Optimization of heat engines with fixed heat fluxes at the hot or the cold side 热侧或冷侧固定热流通量的热机优化

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-16 DOI: 10.1140/epjp/s13360-025-06395-w

J. J. Fernández

引用次数: 0

Higgs decay to (Zgamma ) in the minimal supersymmetric standard model and its nonholomorphic extension 最小超对称标准模型及其非全纯扩展中的希格斯衰变到(Zgamma )

IF 2.8 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2025-05-16 DOI: 10.1140/epjp/s13360-025-06401-1

S. Israr, M. Rehman

{"title":"Higgs decay to (Zgamma ) in the minimal supersymmetric standard model and its nonholomorphic extension","authors":"S. Israr, M. Rehman","doi":"10.1140/epjp/s13360-025-06401-1","DOIUrl":"10.1140/epjp/s13360-025-06401-1","url":null,"abstract":"<div>Recent measurements of ( h rightarrow Z gamma ) from CMS and ATLAS indicate an excess over standard model (SM) predictions, suggesting the presence of new physics. In this work, we investigate the ( h rightarrow Z gamma ) decay within the minimal supersymmetric standard model (MSSM) and its nonholomorphic extension, the NHSSM. Calculations are performed using the FeynArts/FormCalc setup, utilizing the pre-existing model file for MSSM and generating the NHSSM model file with the support of SARAH. For the parameter space examined in this study, MSSM contributions to ( h rightarrow Z gamma ) can significantly surpass SM predictions reaching to the value (Gamma (h rightarrow Z gamma )= 9.77 times 10^{-6} ,, textrm{GeV}), thereby bringing ( Gamma (h rightarrow Z gamma ) ) closer to the experimental value. The SM-predicted value deviates from the experimental value by (1.7 sigma ). However, the MSSM contributions can reduce this deviation to less than (1 sigma ). In contrast, NHSSM contributions remain negligible and do not produce sizable corrections to the ( h rightarrow Z gamma ) decay width.</div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0