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Complementarity vs coordinate transformations: Mapping between pseudo-Hermiticity and weak pseudo-Hermiticity 互补与坐标变换:伪厄密性与弱伪厄密性之间的映射
arXiv: Mathematical Physics Pub Date : 2020-11-05 DOI: 10.1063/5.0036401
Samir Saidani, S. Yahiaoui
{"title":"Complementarity vs coordinate transformations: Mapping between pseudo-Hermiticity and weak pseudo-Hermiticity","authors":"Samir Saidani, S. Yahiaoui","doi":"10.1063/5.0036401","DOIUrl":"https://doi.org/10.1063/5.0036401","url":null,"abstract":"noindent We study the concept of the complementarity, introduced by Bagchi and Quesne in [Phys. Lett. A {bf 301}, 173 (2002)], between pseudo-Hermiticity and weak pseudo-Hermiticity in a rigorous mathematical viewpoint of coordinate transformations when a system has a position-dependent mass. We first determine, under the modified-momentum, the generating functions identifying the complexified potentials $V_pm(x)$ under both concepts of pseudo-Hermiticity $widetildeeta_+$ (resp. weak pseudo-Hermiticity $widetildeeta_-$). We show that the concept of complementarity can be understood and interpreted as a coordinate transformation through their respective generating functions. As consequence, a similarity transformation which implements coordinate transformations is obtained. We show that the similarity transformation is set up as fundamental relationship connecting both $widetildeeta_+$ and $widetildeeta_-$. A special factorization $eta_+=eta_-^dagger eta_-$ is discussed in the case of a constant mass and some B\"acklund transformations are derived.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84449414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nodal deficiency of random spherical harmonics in presence of boundary 存在边界时随机球谐波的节点缺陷
arXiv: Mathematical Physics Pub Date : 2020-11-03 DOI: 10.1063/5.0036084
Valentina Cammarota, D. Marinucci, I. Wigman
{"title":"Nodal deficiency of random spherical harmonics in presence of boundary","authors":"Valentina Cammarota, D. Marinucci, I. Wigman","doi":"10.1063/5.0036084","DOIUrl":"https://doi.org/10.1063/5.0036084","url":null,"abstract":"We consider a random Gaussian model of Laplace eigenfunctions on the hemisphere satisfying the Dirichlet boundary conditions along the equator. For this model we find a precise asymptotic law for the corresponding zero density functions, in both short range (around the boundary) and long range (far away from the boundary) regimes. As a corollary, we were able to find a logarithmic negative bias for the total nodal length of this ensemble relatively to the rotation invariant model of random spherical harmonics. \u0000Jean Bourgain's research, and his enthusiastic approach to the nodal geometry of Laplace eigenfunctions, has made a crucial impact in the field and the current trends within. His works on the spectral correlations (Theorem 2.2 in Krishnapur, Kurlberg and Wigman (2013)) and joint with Bombieri (Bourgain and Bombieri (2015)) have opened a door for an active ongoing research on the nodal length of functions defined on surfaces of arithmetic flavour, like the torus or the square. Further, Bourgain's work on toral Laplace eigenfunctions (Bourgain (2014)), also appealing to spectral correlations, allowed for inferring deterministic results from their random Gaussian counterparts.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87356772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Characteristic determinant and Manakov triple for the double elliptic integrable system 双椭圆可积系统的特征行列式和Manakov三重
arXiv: Mathematical Physics Pub Date : 2020-10-16 DOI: 10.21468/SCIPOSTPHYS.10.3.055
A. Grekov, Andrei Vladimirovich Zotov
{"title":"Characteristic determinant and Manakov triple for the double elliptic integrable system","authors":"A. Grekov, Andrei Vladimirovich Zotov","doi":"10.21468/SCIPOSTPHYS.10.3.055","DOIUrl":"https://doi.org/10.21468/SCIPOSTPHYS.10.3.055","url":null,"abstract":"Using the intertwining matrix of the IRF-Vertex correspondence we propose a determinant representation for the generating function of the commuting Hamiltonians of the double elliptic integrable system. More precisely, it is a ratio of the normally ordered determinants, which turns into a single determinant in the classical case. With its help we reproduce the recently suggested expression for the eigenvalues of the Hamiltonians for the dual to elliptic Ruijsenaars model. Next, we study the classical counterpart of our construction, which gives expression for the spectral curve and the corresponding $L$-matrix. This matrix is obtained explicitly as a weighted average of the Ruijsenaars and/or Sklyanin type Lax matrices with the weights as in the theta function series definition. By construction the $L$-matrix satisfies the Manakov triple representation instead of the Lax equation. Finally, we discuss the factorized structure of the $L$-matrix.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77885052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Gauge transformations of spectral triples with twisted real structures 具有扭曲实结构的谱三元组的规范变换
arXiv: Mathematical Physics Pub Date : 2020-09-24 DOI: 10.1063/5.0038601
Adam M. Magee, Ludwik D൅browski
{"title":"Gauge transformations of spectral triples with twisted real structures","authors":"Adam M. Magee, Ludwik D൅browski","doi":"10.1063/5.0038601","DOIUrl":"https://doi.org/10.1063/5.0038601","url":null,"abstract":"We study the coupling of spectral triples with twisted real structures to gauge fields in the framework of noncommutative geometry and, adopting Morita equivalence via modules and bimodules as a guiding principle, give special attention to modifying the inner fluctuations of the Dirac operator. In particular, we analyse the twisted first-order condition as a possible alternative to the approach of arXiv:1304.7583, and elaborate upon the special case of gauge transformations accordingly. Applying the formalism to a toy model, we argue that under certain physically-motivated assumptions the spectral triple based on the left-right symmetric algebra should reduce to that of the Standard Model of fundamental particles and interactions, as in the untwisted case.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81609810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
New algebraically solvable systems of two autonomous first-order ordinary differential equations with purely quadratic right-hand sides 具有纯二次边的两个自治一阶常微分方程的新代数可解系统
arXiv: Mathematical Physics Pub Date : 2020-09-23 DOI: 10.1063/5.0011257
F. Calogero, R. Conte, F. Leyvraz
{"title":"New algebraically solvable systems of two autonomous first-order ordinary differential equations with purely quadratic right-hand sides","authors":"F. Calogero, R. Conte, F. Leyvraz","doi":"10.1063/5.0011257","DOIUrl":"https://doi.org/10.1063/5.0011257","url":null,"abstract":"We identify many new solvable subcases of the general dynamical system characterized by two autonomous first-order ordinary differential equations with purely quadratic right-hand sides; the solvable character of these dynamical systems amounting to the possibility to obtain the solution of their initial value problem via algebraic operations. Equivalently---by considering the analytic continuation of these systems to complex time---their algebraically solvable character corresponds to the fact that their general solution is either singlevalued or features only a finite number of algebraic branch points as functions of complex time (the independent variable). Thus our results provide a major enlargement of the class of solvable systems beyond those with singlevalued general solution identified by Garnier about 60 years ago. An interesting property of several of these new dynamical systems is the elementary character of their general solution, identifiable as the roots of a polynomial with explicitly obtainable time-dependent coefficients. We also mention that, via a well-known time-dependent change of (dependent and independent) variables featuring the imaginary parameter $% mathbf{i} omega $ (with $omega $ an arbitrary strictly positive real number), autonomous variants can be explicitly exhibited of each of the algebraically solvable models we identify: variants which all feature the remarkable property to be isochronous, i.e. their generic solution is periodic with a period that is a fixed integer multiple of the basic period $T=2pi/omega$.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73543758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
All self-adjoint extensions of the magnetic Laplacian in nonsmooth domains and gauge transformations 磁拉普拉斯算子在非光滑域和规范变换中的所有自伴随扩展
arXiv: Mathematical Physics Pub Date : 2020-09-23 DOI: 10.2422/2036-2145.201908_008
C. Oliveira, W. Monteiro
{"title":"All self-adjoint extensions of the magnetic Laplacian in nonsmooth domains and gauge transformations","authors":"C. Oliveira, W. Monteiro","doi":"10.2422/2036-2145.201908_008","DOIUrl":"https://doi.org/10.2422/2036-2145.201908_008","url":null,"abstract":"We use boundary triples to find a parametrization of all self-adjoint extensions of the magnetic Schrodinger operator, in a quasi-convex domain~$Omega$ with compact boundary, and magnetic potentials with components in $textrm{W}^{1}_{infty}(overline{Omega})$. This gives also a new characterization of all self-adjoint extensions of the Laplacian in nonregular domains. Then we discuss gauge transformations for such self-adjoint extensions and generalize a characterization of the gauge equivalence of the Dirichlet magnetic operator for the Dirichlet Laplacian; the relation to the Aharonov-Bohm effect, including irregular solenoids, is also discussed. In particular, in case of (bounded) quasi-convex domains it is shown that if some extension is unitarily equivalent (through the multiplication by a smooth unit function) to a realization with zero magnetic potential, then the same occurs for all self-adjoint realizations.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74716820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Rational solutions of Painlevé systems. painlev<s:1>系统的理性解。
arXiv: Mathematical Physics Pub Date : 2020-09-23 DOI: 10.1201/9780429263743-9
D. Gómez‐Ullate, Y. Grandati, R. Milson
{"title":"Rational solutions of Painlevé systems.","authors":"D. Gómez‐Ullate, Y. Grandati, R. Milson","doi":"10.1201/9780429263743-9","DOIUrl":"https://doi.org/10.1201/9780429263743-9","url":null,"abstract":"Although the solutions of Painleve equations are transcendental in the sense that they cannot be expressed in terms of known elementary functions, there do exist rational solutions for specialized values of the equation parameters. A very successful approach in the study of rational solutions to Painleve equations involves the reformulation of these scalar equations into a symmetric system of coupled, Riccati-like equations known as dressing chains. Periodic dressing chains are known to be equivalent to the $A_N$-Painleve system, first described by Noumi and Yamada. The Noumi-Yamada system, in turn, can be linearized as using bilinear equations and $tau$-functions; the corresponding rational solutions can then be given as specializations of rational solutions of the KP hierarchy. \u0000The classification of rational solutions to Painleve equations and systems may now be reduced to an analysis of combinatorial objects known as Maya diagrams. The upshot of this analysis is a an explicit determinental representation for rational solutions in terms of classical orthogonal polynomials. In this paper we illustrate this approach by describing Hermite-type rational solutions of Painleve of the Noumi-Yamada system in terms of cyclic Maya diagrams. By way of example we explicitly construct Hermite-type solutions for the PIV, PV equations and the $A_4$ Painleve system.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90147782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Coherent states of systems with pure continuous energy spectra 纯连续能谱系统的相干态
arXiv: Mathematical Physics Pub Date : 2020-09-21 DOI: 10.1063/5.0030759
Z. Mouayn, H. A. Yamani
{"title":"Coherent states of systems with pure continuous energy spectra","authors":"Z. Mouayn, H. A. Yamani","doi":"10.1063/5.0030759","DOIUrl":"https://doi.org/10.1063/5.0030759","url":null,"abstract":"While dealing with a Hamiltonian with continuous spectrum we use a tridiagonal method involving orthogonal polynomials to construct a set of coherent states obeying a Glauber-type condition. We perform a Bayesian decomposition of the weight function of the orthogonality measure to show that the obtained coherent states can be recast in the Gazeau-Klauder approach. The Hamiltonian of the $ell$-wave free particle is treated as an example to illustrate the method.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74867612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Revisiting Groeneveld’s approach to the virial expansion 再次回顾格林内菲尔德的病毒式扩张方法
arXiv: Mathematical Physics Pub Date : 2020-09-19 DOI: 10.1063/5.0030148
S. Jansen
{"title":"Revisiting Groeneveld’s approach to the virial expansion","authors":"S. Jansen","doi":"10.1063/5.0030148","DOIUrl":"https://doi.org/10.1063/5.0030148","url":null,"abstract":"A generalized version of Groeneveld's convergence criterion for the virial expansion and generating functionals for weighted $2$-connected graphs is proven. The criterion works for inhomogeneous systems and yields bounds for the density expansions of the correlation functions $rho_s$ (a.k.a. distribution functions or factorial moment measures) of grand-canonical Gibbs measures with pairwise interactions. The proof is based on recurrence relations for graph weights related to the Kirkwood-Salsburg integral equation for correlation functions. The proof does not use an inversion of the density-activity expansion, however a Moebius inversion on the lattice of set partitions enters the derivation of the recurrence relations.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74410400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Landau levels for the (2 + 1) Dunkl–Klein–Gordon oscillator (2 + 1) Dunkl-Klein-Gordon振荡器的朗道能级
arXiv: Mathematical Physics Pub Date : 2020-09-11 DOI: 10.1142/S0217732321500668
R. D. Mota, D. Ojeda-Guill'en, M.Salazar-Ram'irez, V. Granados
{"title":"Landau levels for the (2 + 1) Dunkl–Klein–Gordon oscillator","authors":"R. D. Mota, D. Ojeda-Guill'en, M.Salazar-Ram'irez, V. Granados","doi":"10.1142/S0217732321500668","DOIUrl":"https://doi.org/10.1142/S0217732321500668","url":null,"abstract":"In this paper we study the $(2+1)$-dimensional Klein-Gordon oscillator coupled to an external magnetic field, in which we change the standard partial derivatives for the Dunkl derivatives. We find the energy spectrum (Landau levels) in an algebraic way, by introducing three operators that close the $su(1,1)$ Lie algebra and from the theory of unitary representations. Also we find the energy spectrum and the eigenfunctions analytically, and we show that both solutions are consistent. Finally, we demonstrate that when the magnetic field vanishes or when the parameters of the Dunkl derivatives are set zero, our results are adequately reduced to those reported in the literature.","PeriodicalId":8469,"journal":{"name":"arXiv: Mathematical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78134416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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