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Higher-derivative four-dimensional sine–Gordon model 高派生四维正弦-戈登模型
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-12 DOI: 10.1016/j.aop.2024.169840
Matteo F. Bontorno , G.G.N. Angilella , Dario Zappalà
{"title":"Higher-derivative four-dimensional sine–Gordon model","authors":"Matteo F. Bontorno ,&nbsp;G.G.N. Angilella ,&nbsp;Dario Zappalà","doi":"10.1016/j.aop.2024.169840","DOIUrl":"10.1016/j.aop.2024.169840","url":null,"abstract":"<div><div>The phase structure of a higher-derivative sine–Gordon model in four dimensions is analyzed. It is shown that the inclusion of a relevant two-derivative term in the action significantly modifies some of the results obtained by neglecting this operator, and the final picture is substantially different from the one describing the phase diagram associated with the two-dimensional Berezinskii–Kosterlitz–Thouless (BKT) transition. The study is carried out with the help of the Renormalization Group (RG) flow equations, determined for a set of three parameters, and numerically solved both for a truncated series expansion approximation, and for the complete set of equations. In both cases, a continuous line of fixed points, terminating at a particular point presenting universal properties, is found, together with a manifold that separates two phases, roughly characterized by the sign of the coupling <span><math><msub><mrow><mover><mrow><mi>z</mi></mrow><mrow><mo>˜</mo></mrow></mover></mrow><mrow><mi>k</mi></mrow></msub></math></span> associated with this newly included operator. While the phase corresponding to <span><math><mrow><msub><mrow><mover><mrow><mi>z</mi></mrow><mrow><mo>˜</mo></mrow></mover></mrow><mrow><mi>k</mi></mrow></msub><mo>&gt;</mo><mn>0</mn></mrow></math></span> shows some pathologies, the one with <span><math><mrow><msub><mrow><mover><mrow><mi>z</mi></mrow><mrow><mo>˜</mo></mrow></mover></mrow><mrow><mi>k</mi></mrow></msub><mo>&lt;</mo><mn>0</mn></mrow></math></span> has a well-behaved infrared limit, where the system reduces to a Gaussian-like model. We also briefly comment about the possibility that our model could capture some of the qualitative features of the ultraviolet (UV) critical manifold of conformally reduced gravity.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169840"},"PeriodicalIF":3.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704766","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
Nondipole interaction between two uniformly magnetized spheres and its relation to superconducting levitation 两个均匀磁化球体之间的非偶极子相互作用及其与超导悬浮的关系
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-12 DOI: 10.1016/j.aop.2024.169839
Denis Nikolaevich Sob’yanin (Денис Николаевич Собьянин)
{"title":"Nondipole interaction between two uniformly magnetized spheres and its relation to superconducting levitation","authors":"Denis Nikolaevich Sob’yanin (Денис Николаевич Собьянин)","doi":"10.1016/j.aop.2024.169839","DOIUrl":"10.1016/j.aop.2024.169839","url":null,"abstract":"<div><div>Analytically solving the magnetostatic Maxwell equations in the bispherical coordinates, we calculate the magnetic field around two uniformly magnetized spheres oriented so that their magnetic moments are parallel to the axis passing through the centers of the spheres. We demonstrate that, contrary to what is often claimed in the literature, the magnetic interaction between such spheres is not equivalent to the interaction between two point magnetic dipoles placed in the centers of the spheres. The nonzero levitation force acting on a uniformly magnetized sphere or a point magnetic dipole above a superconducting sphere in the ideal Meissner state is a clear manifestation of the non-equivalence.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169839"},"PeriodicalIF":3.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142704767","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
Topological flat band with higher winding number in a superradiance lattice 超辐射晶格中具有较高绕组数的拓扑平带
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-08 DOI: 10.1016/j.aop.2024.169837
Shuai Li , Rui Tian , Min Liu , Maksims Arzamasovs , Liangchao Chen , Bo Liu
{"title":"Topological flat band with higher winding number in a superradiance lattice","authors":"Shuai Li ,&nbsp;Rui Tian ,&nbsp;Min Liu ,&nbsp;Maksims Arzamasovs ,&nbsp;Liangchao Chen ,&nbsp;Bo Liu","doi":"10.1016/j.aop.2024.169837","DOIUrl":"10.1016/j.aop.2024.169837","url":null,"abstract":"<div><div>A five-level M-type scheme in atomic ensembles is proposed to generate a one-dimensional bipartite superradiance lattice in momentum space. By taking advantage of this tunable atomic system, we show that various types of Su-Schrieffer-Heeger (SSH) model, including the standard SSH and extended SSH model, can be realized. Interestingly, it is shown that through changing the Rabi frequencies and detunings in our proposed scheme, there is a topological phase transition from topological trivial regime with winding number being 0 to topological non-trivial regime with winding number being 2. Furthermore, a robust flat band with higher winding number (being 2) can be achieved in the above topological non-trivial regime, where the superradiance spectra can be utilized as a tool for experimental detection. Our proposal would provide a promising approach to explore new physics, such as fractional topological phases, in the flat bands with higher topological number.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169837"},"PeriodicalIF":3.0,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651359","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
Semiclassical transport in two-dimensional Dirac materials with spatially variable tilt 具有空间可变倾斜度的二维狄拉克材料中的半经典传输
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-07 DOI: 10.1016/j.aop.2024.169838
Abolfath Hosseinzadeh , S.A. Jafari
{"title":"Semiclassical transport in two-dimensional Dirac materials with spatially variable tilt","authors":"Abolfath Hosseinzadeh ,&nbsp;S.A. Jafari","doi":"10.1016/j.aop.2024.169838","DOIUrl":"10.1016/j.aop.2024.169838","url":null,"abstract":"<div><div>We use Boltzmann theory to study the semi-classical dynamics of electrons in a two-dimensional (2D) tilted Dirac material in which the tilt varies in space. The spatial variation of the tilt parameter induces a non-trivial spacetime geometry on the background of which the electrons roam about. As the first manifestation of gravito-electric phenomena, we find a geometric planar Hall effect according to which a current flows in a direction transverse to the chemical potential gradient and is proportional to <span><math><msup><mrow><mi>g</mi></mrow><mrow><mi>x</mi><mi>y</mi></mrow></msup></math></span> component of the emergent spacetime structure. The longitudinal conductivity contains information about the gravitational red-shift factors. Furthermore, in the absence of externally applied electric field there can be “free-fall” or zero-bias currents that can be used as detectors of terahertz radiation.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169838"},"PeriodicalIF":3.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651358","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
The fate for the interior content of a Black Hole from one-quarter entropy area-law 从四分之一熵区定律看黑洞内部内容的命运
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-05 DOI: 10.1016/j.aop.2024.169836
S. Viaggiu
{"title":"The fate for the interior content of a Black Hole from one-quarter entropy area-law","authors":"S. Viaggiu","doi":"10.1016/j.aop.2024.169836","DOIUrl":"10.1016/j.aop.2024.169836","url":null,"abstract":"<div><div>In this paper we continue investigations concerning the physical nature of the black hole entropy. In particular, in order to depict massless excitations (gravitons) leading to the one-quarter entropy area law, we use a mechanical statistical approach. As a first result, we obtain that, starting with a radiation field, we cannot exactly obtain the one-quarter factor in entropy area law. In the aforementioned framework, the correct black hole entropy is obtained only in the case where the internal temperature <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>i</mi></mrow></msub></math></span>, proportional to the Bekenstein-Hawking one, is such that <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>i</mi></mrow></msub><mo>→</mo><mn>0</mn></mrow></math></span>. As a consequence, according to other similar proposals in the literature, only a kind of Bose–Einstein condensate (BEC) can exactly support the black hole entropy.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169836"},"PeriodicalIF":3.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651357","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
Thin-shell wormholes with non-collapsing dark energy throats connecting flat Minkowski spacetimes 连接平坦闵科夫斯基时空的具有非塌缩暗能量咽喉的薄壳虫洞
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-05 DOI: 10.1016/j.aop.2024.169834
S. Habib Mazharimousavi
{"title":"Thin-shell wormholes with non-collapsing dark energy throats connecting flat Minkowski spacetimes","authors":"S. Habib Mazharimousavi","doi":"10.1016/j.aop.2024.169834","DOIUrl":"10.1016/j.aop.2024.169834","url":null,"abstract":"<div><div>This research revisits the thin-shell wormhole connecting two Minkowski spacetimes — originally introduced by Matt Visser. Upon setting a particular timelike hypersurface with a de-sitter-induced line element, the corresponding thin-shell wormhole (TSW) possesses a minimum radius and a uniform surface energy–momentum tensor in the form of dark energy. <em>The bounded from below radius for the throat implies that it does not collapse.</em> The <span><math><mrow><mi>r</mi><mo>−</mo><mi>τ</mi></mrow></math></span> profile curve of the hypersurface is a Catenary in <span><math><mrow><mi>r</mi><mo>−</mo><mi>τ</mi></mrow></math></span> plane where <span><math><mi>r</mi></math></span> and <span><math><mi>τ</mi></math></span> are the radial coordinate and the proper time on the throat, respectively. It is also shown that while the throat is dynamic, the surface energy–momentum tensor of the dark energy is in the form of an effective cosmological constant in the spherically symmetric TSW. The <span><math><mn>4</mn></math></span>-dimensional cylindrically symmetric TSW with a similar throat profile shares the same features as its spherical counterpart, however, its uniform surface energy–momentum tensor does not mimic an effective cosmological constant. The higher-dimensional generalization of the spherically symmetric TSW admits the same properties as in the <span><math><mn>4</mn></math></span>-dimensional one.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169834"},"PeriodicalIF":3.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651362","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
Coherent states of graphene layer with and without a PT-symmetric chemical potential 具有和不具有 PT 对称化学势的石墨烯层相干态
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-04 DOI: 10.1016/j.aop.2024.169828
F. Bagarello , F. Gargano , L. Saluto
{"title":"Coherent states of graphene layer with and without a PT-symmetric chemical potential","authors":"F. Bagarello ,&nbsp;F. Gargano ,&nbsp;L. Saluto","doi":"10.1016/j.aop.2024.169828","DOIUrl":"10.1016/j.aop.2024.169828","url":null,"abstract":"<div><div>In this paper we construct different classes of coherent and bicoherent states for the graphene tight-binding model in presence of a magnetic field, and for a deformed version where we include a <span><math><mrow><mi>P</mi><mi>T</mi></mrow></math></span>-symmetric chemical potential <span><math><mi>V</mi></math></span>. In particular, the problems caused by the absence of a suitable ground state for the system is taken into account in the construction of these states, for <span><math><mrow><mi>V</mi><mo>=</mo><mn>0</mn></mrow></math></span> and for <span><math><mrow><mi>V</mi><mo>≠</mo><mn>0</mn></mrow></math></span>. We introduce ladder operators which work well in our context, and we show, in particular, that there exists a choice of these operators which produce a factorization of the Hamiltonian. The role of broken and unbroken <span><math><mrow><mi>P</mi><mi>T</mi></mrow></math></span>-symmetry is discussed, in connection with the strength of <span><math><mi>V</mi></math></span>.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169828"},"PeriodicalIF":3.0,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651363","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
Linear and quadratic behaviors in a two-level laser 双电平激光器中的线性和二次方行为
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-01 DOI: 10.1016/j.aop.2024.169832
Babak Parvin
{"title":"Linear and quadratic behaviors in a two-level laser","authors":"Babak Parvin","doi":"10.1016/j.aop.2024.169832","DOIUrl":"10.1016/j.aop.2024.169832","url":null,"abstract":"<div><div>A two-level atom is enclosed in a single-mode optical cavity, and the occurring processes in this system have been theoretically examined in the steady-state. In the non-resonance case and in several different instances, the lasing and non-lasing regimes are specified in the semiclassical approximation in the parameter space. The behavior of the system is fully described for the time when there are a small or large number of photons in the cavity. The semiclassical approximation is shown in two different frameworks, and its results are well confirmed by the quantum simulations when there are many photons in the cavity. To observe the change in the behavior of the emitted light near the laser threshold, the second order coherence function and the Fano factor have been used. In explaining the antibunching process, the explicit form of the second order coherence function has been obtained in two different representations. This function is equal in both representations to the lowest order and its findings are in good agreement with the quantum model.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"471 ","pages":"Article 169832"},"PeriodicalIF":3.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587059","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
Singular parametric oscillators from the one-parameter Darboux transformation of the classical harmonic oscillator 来自经典谐波振荡器单参数达尔布克斯变换的奇异参量振荡器
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-01 DOI: 10.1016/j.aop.2024.169830
H.C. Rosu, J. de la Cruz
{"title":"Singular parametric oscillators from the one-parameter Darboux transformation of the classical harmonic oscillator","authors":"H.C. Rosu,&nbsp;J. de la Cruz","doi":"10.1016/j.aop.2024.169830","DOIUrl":"10.1016/j.aop.2024.169830","url":null,"abstract":"<div><div>The singular parametric oscillators obtained from the one-parameter Darboux deformation/ transformation effected upon the classical harmonic oscillator are introduced and discussed in some detail using <span><math><mrow><mo>sin</mo><mrow><mo>(</mo><msub><mrow><mi>ω</mi></mrow><mrow><mn>0</mn></mrow></msub><mi>t</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mo>cos</mo><mrow><mo>(</mo><msub><mrow><mi>ω</mi></mrow><mrow><mn>0</mn></mrow></msub><mi>t</mi><mo>)</mo></mrow></mrow></math></span> as seed solutions. The corresponding Ermakov–Lewis integrability problem of these parametric oscillators is also studied. It is shown that their Ermakov–Lewis invariants do not depend on the deformation parameter and are singularity-free.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"470 ","pages":"Article 169830"},"PeriodicalIF":3.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553860","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
Exactly solvable time-dependent oscillator family 可精确求解的时变振荡器族
IF 3 3区 物理与天体物理
Annals of Physics Pub Date : 2024-11-01 DOI: 10.1016/j.aop.2024.169831
Xin Gu , Yuan-Yuan Liu , Hong-Wei Ke , Wen-Du Li , Wu-Sheng Dai
{"title":"Exactly solvable time-dependent oscillator family","authors":"Xin Gu ,&nbsp;Yuan-Yuan Liu ,&nbsp;Hong-Wei Ke ,&nbsp;Wen-Du Li ,&nbsp;Wu-Sheng Dai","doi":"10.1016/j.aop.2024.169831","DOIUrl":"10.1016/j.aop.2024.169831","url":null,"abstract":"<div><div>This paper proposes a method for constructing exactly solvable time-dependent oscillator families based on the invariant operator method and the duality method. An exactly solvable time-dependent oscillator family contains an infinite number of exactly solvable time-dependent oscillators. As a byproduct, we also construct exactly solvable Ermakov–Pinney equation families.</div></div>","PeriodicalId":8249,"journal":{"name":"Annals of Physics","volume":"470 ","pages":"Article 169831"},"PeriodicalIF":3.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553861","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
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