物理最新文献

{"title":"Three-loop verification of the equations relating running of the gauge couplings in (mathcal{N}=1) SQCD + SQED","authors":"O. V. Haneychuk,&nbsp;K. V. Stepanyantz","doi":"10.1140/epjc/s10052-025-14250-6","DOIUrl":"10.1140/epjc/s10052-025-14250-6","url":null,"abstract":"<div><p>We verify a recently derived equations relating the renormalization group running of two gauge couplings in <span>(mathcal{N}=1)</span> SQCD + SQED by the explicit three-loop calculation. It is demonstrated that these equations are really valid in the HD + MSL scheme. In other words, if a theory is regularized by higher covariant derivatives and the renormalization is made by minimal subtractions of logarithms, the analogs of the strong and electromagnetic gauge couplings do not run independently. However, in the <span>(overline{text{ DR }})</span> scheme the considered equations do not hold starting from the three-loop order, where the scheme dependence becomes essential. Therefore, they are valid only for a certain set of the renormalization prescriptions. We prove that all of them can be obtained from the HD + MSL scheme by finite renormalizations which satisfy a special constraint and illustrate how this works in the three-loop approximation.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14250-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Quantum dynamics in Krylov space: Methods and applications","authors":"Pratik Nandy ,&nbsp;Apollonas S. Matsoukas-Roubeas ,&nbsp;Pablo Martínez-Azcona ,&nbsp;Anatoly Dymarsky ,&nbsp;Adolfo del Campo","doi":"10.1016/j.physrep.2025.05.001","DOIUrl":"10.1016/j.physrep.2025.05.001","url":null,"abstract":"<div><div>The dynamics of quantum systems unfolds within a subspace of the state space or operator space, known as the Krylov space. This review presents the use of Krylov subspace methods to provide an efficient description of quantum evolution and quantum chaos, with emphasis on nonequilibrium phenomena of many-body systems with a large Hilbert space. It provides a comprehensive update of recent developments, focused on the quantum evolution of operators in the Heisenberg picture as well as pure and mixed states. It further explores the notion of Krylov complexity and associated metrics as tools for quantifying operator growth, their bounds by generalized quantum speed limits, the universal operator growth hypothesis, and its relation to quantum chaos, scrambling, and generalized coherent states. A comparison of several generalizations of the Krylov construction for open quantum systems is presented. A closing discussion addresses the application of Krylov subspace methods in quantum field theory, holography, integrability, quantum control, and quantum computing, as well as current open problems.</div></div>","PeriodicalId":404,"journal":{"name":"Physics Reports","volume":"1125 ","pages":"Pages 1-82"},"PeriodicalIF":23.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

{"title":"Retraction Note: Influence of Cr3+-substituted Co0.7Cu0.3Fe2-xCrxO4 nanoferrite on structural, morphological, dc electrical resistivity and magnetic properties","authors":"K. Chandramouli,&nbsp;Vemuri Raghavendra,&nbsp;P. V. S. K. Phanidhar Varma,&nbsp;B. Suryanarayana,&nbsp;Tulu Wegayehu Mammo,&nbsp;D. Parajuli,&nbsp;Paulos Taddesse,&nbsp;N. Murali","doi":"10.1007/s00339-025-08599-4","DOIUrl":"10.1007/s00339-025-08599-4","url":null,"abstract":"","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling and managing chaos: a fear-affected discretized prey–predator system with Allee Effect","authors":"Manisha Yadav,&nbsp;Pradeep Malik,&nbsp;Md. Jasim Uddin,&nbsp;Nehad Ali Shah","doi":"10.1140/epjp/s13360-025-06354-5","DOIUrl":"10.1140/epjp/s13360-025-06354-5","url":null,"abstract":"<div><p>This paper investigates the dynamics of a two-dimensional discretized prey–predator model, the effects of fear, and the Allee phenomenon in prey populations. A comprehensive analysis of equilibrium points and their stability is conducted, along with exploring bifurcation phenomena, including Flip and Neimark–Sacker bifurcations. The influence of complex network interactions on system dynamics is also examined. Numerical simulations reveal the presence of chaotic behavior under certain parametric conditions. To address this instability, the OGY chaos control method is applied to regulate chaos and stabilize the system. The results offer valuable insights into how fear effects, Allee thresholds, and network structures influence ecological systems, enhancing the understanding of population stability and chaotic fluctuations in predator–prey relationships.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074070","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}

{"title":"Impact of appropriate similarity transformations on the heat transfer analysis of the Casson trihybrid shape-dependent nanofluid with suction(/)injection and thermal radiation through a stretching sheet","authors":"B J Gireesha,&nbsp;C G Pavithra","doi":"10.1007/s12043-025-02916-5","DOIUrl":"10.1007/s12043-025-02916-5","url":null,"abstract":"<div><p>Exploration of a non-linear stretching sheet has been conducted by utilising the Casson model, focussing on an exclusive mixture known as a ternary hybrid nanofluid. This particular nanofluid is a mixture of ethylene glycol hosting suspended graphene, carbon nanotubes and aluminium oxide. The nanoparticles scattered in the underlying liquid are anticipated to exhibit distinct formations like brick blades and lamina, ensuring an efficient connection between the expansive surface of the nanoparticles and the foundational fluid. As a result, this configuration allows for improved absorption of heat from the surface. Many fluid flow problems require the use of a similarity transformation to simplify the equations and make them more tractable. However, it is crucial to derive the correct similarity transformation for each specific problem. Unfortunately, many researchers overlook this step or employ inappropriate transformations, leading to erroneous results. This paper aims to address this issue by systematically deriving suitable similarity transformations for various flow problems, ensuring the accuracy and reliability of the solutions obtained. We derived an appropriate set of similarity transformations for a particular flow problem, in which the similarity variable is dimensionless and appears in the formulation as a function of all independent variables. The numerical solution of the modified equations was obtained using the Runge–Kutta Fehlberg 4–5th method. The study suggests that the temperature distribution is most significant with nanoparticles featuring brick–brick–lamina configurations, followed by brick–brick–blade and brick–brick–brick arrangements.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":743,"journal":{"name":"Pramana","volume":"99 2","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

{"title":"Generation of quantum entanglement in superposed diamond spacetime","authors":"Xiaofang Liu,&nbsp;Changjing Zeng,&nbsp;Jieci Wang","doi":"10.1140/epjc/s10052-025-14251-5","DOIUrl":"10.1140/epjc/s10052-025-14251-5","url":null,"abstract":"<div><p>A comprehensive study integrating the microscopic structure of spacetime and the principle of quantum superposition is capable of offering a fundamental bottom-up approach for understanding the quantum aspect of gravity. In this paper, we present a framework for the superposition of spacetime structures in the causal diamond spacetime and analyze the behavior of quantum entanglement generated by spacetime superposition from the perspective of relativistic quantum information. For the first time, we combine the concept of spacetime superposition with causal diamonds and derive the analytical expression of the Unruh-diamond vacuum state for Dirac fields in the causal diamond spacetime. Based on this, we analyze both initially correlated and uncorrelated modes in superposed and classical causal diamond spacetimes, and quantifying how quantum thermal effects arising from spacetime structure alter entanglement. Our findings reveal that quantum entanglement degrades in classical diamond spacetime, while the superposed structure generates additional entanglement resources between modes in superposed diamond spacetimes. From a quantum information perspective, our results suggest that the characteristics of spacetime structural manifestations can serve as valuable resources for performing quantum information processing tasks.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14251-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Correction: Effects of selected physical parameters on the gamma-ray-induced EPR signal of glycine dosimeter","authors":"E. Aboelezz,&nbsp;M. A. Sharaf","doi":"10.1140/epjp/s13360-025-06133-2","DOIUrl":"10.1140/epjp/s13360-025-06133-2","url":null,"abstract":"","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 5","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06133-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074071","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}

{"title":"RG-stable parameter relations of a scalar field theory in absence of a symmetry","authors":"Howard E. Haber,&nbsp;P. M. Ferreira","doi":"10.1140/epjc/s10052-025-14148-3","DOIUrl":"10.1140/epjc/s10052-025-14148-3","url":null,"abstract":"<div><p>The stability of tree-level relations among the parameters of a quantum field theory with respect to renormalization group (RG) running is typically explained by the existence of a symmetry. We examine a toy model of a quantum field theory of two real scalars in which a tree-level relation among the squared-mass parameters of the scalar potential appears to be RG-stable without the presence of an appropriate underlying symmetry. The stability of this relation with respect to renormalization group running can be explained by complexifying the original scalar field theory. It is then possible to exhibit a symmetry that guarantees the relations of relevant beta functions of squared-mass parameters of the complexified theory. Among these relations, we can identify equations that are algebraically identical to the corresponding equations that guarantee the stability of the relations among the squared-mass parameters of the original real scalar field theory where the symmetry of the complexified theory is no longer present.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14148-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Boson stars and their frozen states in an infinite tower of higher-derivative gravity","authors":"Tian-Xiang Ma,&nbsp;Tie-Feng Fang,&nbsp;Yong-Qiang Wang","doi":"10.1140/epjc/s10052-025-14252-4","DOIUrl":"10.1140/epjc/s10052-025-14252-4","url":null,"abstract":"<div><p>In this paper, we present a solution for a five-dimensional boson star under gravity with infinite tower of higher-curvature corrections. We discover that when the coupling constant exceeds a certain threshold, an alternative configuration emerges, distinct from the conventional five-dimensional boson star. This new structure is characterized by a broader frequency range, with a minimum value approaching zero. At a truncation of second-derivative correction term, the solution and its scalar curvature diverge as the frequency approaches zero. However, as the order of higher-curvature corrections increases, the singularity at the center vanishes, resulting in a globally regular solution. Additionally, as the frequency approaches zero, the scalar field’s radial distribution becomes concentrated within the critical radius <span>(r_c)</span>, forming what we term a “frozen star”. Beyond this radius, the metric of the frozen star almost degenerates into that of an extreme black hole. The solutions for such frozen stars offer a new avenue for exploring the mysterious interiors of compact objects, enhancing our understanding of the internal structure of black holes under semi-classical conditions and potentially addressing the series of paradoxes associated with information loss due to singularities and horizons.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 5","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14252-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144074069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Surface acoustic wave characteristics in ZnO thin films deposited on different Silicon-based multilayered substrates","authors":"F. Laidoudi,&nbsp;C. Caliendo,&nbsp;F. Kanouni,&nbsp;S. Amara","doi":"10.1007/s00339-025-08565-0","DOIUrl":"10.1007/s00339-025-08565-0","url":null,"abstract":"<div><p>This paper investigates the characteristics of surface acoustic waves (SAWs) in piezoelectric ZnO thin films deposited on various bilayer substrates composed of silicon-derived materials. Finite element analysis is used to study the phase velocities and electromechanical coupling factors K² of the first two fundamental SAW modes, propagating in multilayered ZnO/Si, ZnO/SiC/Si, ZnO/SiO₂/Si, and ZnO/SiN/Si structures. ZnO thin films are grown on these substrates and subsequently characterized using atomic force microscopy (AFM) and X-ray diffraction (XRD) to assess film quality. Among the studied configurations, ZnO/SiO₂/Si demonstrates the best performance, exhibiting well-defined SAW modes, superior crystallinity and enhanced K². ZnO/SiO₂/Si SAW delay line is then fabricated using conventional photolithography and electrically characterized by network analyzer. The response of the device confirms the presence of both Rayleigh and Sezawa modes, aligning with numerical predictions. The findings of this study contribute to the development of high-performance SAW sensors and resonators compatible with silicon and silicon-based technologies.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}