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In this paper we analyse semi-linear systems of partial differential equations which are motivated by the conformal formulation of the Einstein constraint equations coupled with realistic physical fields on asymptotically Euclidean (AE)…

广义相对论与量子宇宙学 · 物理学 2022-04-18 Rodrigo Avalos , Jorge H. Lira

Quantum point contacts (QPC) are fundamental building blocks of nanoelectronic circuits. For their emission dynamics as well as for interaction effects such as the 0.7-anomaly the details of the electrostatic potential are important, but…

介观与纳米尺度物理 · 物理学 2020-09-21 Max Geier , Jaan Freudenfeld , Jorge T. Silva , Vladimir Umansky , Dirk Reuter , Andreas D. Wieck , Piet W. Brouwer , Stefan Ludwig

We study the quantization of coupled K\"ahler-Einstein (CKE) metrics, namely we approximate CKE metrics by means of the canonical Bergman metrics, so called the ``balanced metrics''. We prove the existence and weak convergence of balanced…

微分几何 · 数学 2021-09-08 Ryosuke Takahashi

In this paper, we consider the Yamabe equation on a complete noncompact Riemannian manifold and find some geometric conditions on the manifold such that the Yamabe problem admits a bounded positive solution.

微分几何 · 数学 2018-01-23 Guodong Wei

We consider $n$-body problems given by potentials of the form ${\alpha\over r^a}+{\beta\over r^b}$ with $a,b,\alpha,\beta$ constants, $0\le a<b$. To analyze the dynamics of the problem, we first prove some properties related to central…

数学物理 · 物理学 2009-09-29 Florin Diacu , Ernesto Perez-Chavela , Manuele Santoprete

We propose the notion of $E_{2}$-quasi-exact solvability and apply this idea to find explicit solutions to the eigenvalue problem for a non-Hermitian Hamiltonian system depending on two parameters. The model considered reduces to the…

量子物理 · 物理学 2015-05-18 Andreas Fring

We establish the following uniformization result for metric spaces $X$ of finite Hausdorff 2-measure. If $X$ is homeomorphic to a smooth 2-manifold $M$ with non-empty boundary, then we show that $X$ admits a quasiconformal almost…

度量几何 · 数学 2022-08-25 Damaris Meier

Many authors have studied Ricci solitons and their analogs within the framework of (almost) contact geometry. In this article, we thoroughly study the $(m,\rho)$-quasi-Einstein structure on a contact metric manifold. First, we prove that if…

微分几何 · 数学 2020-10-30 Dhriti Sundar Patra , Vladimir Rovenski

The large-scale geometry of hyperbolic metric spaces exhibits many distinctive features, such as the stability of quasi-geodesics (the Morse Lemma), the visibility property, and the homeomorphism between visual boundaries induced by a…

度量几何 · 数学 2019-01-29 Bruce Kleiner , Urs Lang

Phase diagrams chart material properties with respect to one or more external or internal parameters such as pressure or magnetisation; as such, they play a fundamental role in many theoretical and applied fields of science. In this work,…

量子物理 · 物理学 2021-05-28 James D. Watson , Johannes Bausch

In this paper we prove that a conformally compact Einstein manifold with the round sphere as its conformal infinity has to be the hyperbolic space. We do not assume the manifolds to be spin, but our approach relies on the positive mass…

微分几何 · 数学 2007-05-23 Jie Qing

An $F$-manifold is complex manifold with a multiplication on the holomorphic tangent bundle with a certain integrability condition. Important examples are Frobenius manifolds and especially base spaces of universal unfoldings of isolated…

微分几何 · 数学 2016-06-22 Liana David , Claus Hertling

We investigate the critical behavior of continuous phase transitions in the context of Ginzburg Landau models with a double well effective potential. In particular, we show that the recently proposed configurational entropy, a measure of…

统计力学 · 物理学 2020-12-10 Marcelo Gleiser , Damian Sowinski

Let $(M,\,g)$ be a Poincar$\acute{\text{e}}$-Einstein manifold with a smooth defining function. In this note, we prove that there are infinitely many asymptotically hyperbolic metrics with constant $Q$-curvature in the conformal class of an…

微分几何 · 数学 2012-10-16 Gang Li

We introduce a new concept of infinite quasi-exactly solvable models which are constructable through multi-parameter deformations of known exactly solvable ones. The spectral problem for these models admits exact solutions for infinitely…

高能物理 - 理论 · 物理学 2007-05-23 H. D. Doebner , K. Lazarow , A. G. Ushveridze

In this article we study a class of prescribed curvature problems on complete noncompact Riemannian manifolds. To be precise, we derive local $C^0$-estimate under an asymptotic condition which is in effect optimal, and prove the existence…

微分几何 · 数学 2021-01-14 Rirong Yuan

In this article we consider a priori error and pointwise estimates for finite element approximations of solutions to semilinear elliptic boundary value problems in d>=2 space dimensions, with nonlinearities satisfying critical growth…

数值分析 · 数学 2011-12-22 Randolph E. Bank , Michael Holst , Ryan Szypowski , Yunrong Zhu

On a 4-dimensional compact symplectic manifold, we consider a smooth family of compatible almost-complex structures such that at time zero the induced metric is Hermite-Einstein almost-K\"ahler metric with zero or negative Hermitian scalar…

微分几何 · 数学 2013-10-01 Mehdi Lejmi

The Improved Quantum Null Energy Condition (INEC) was recently derived from the (restricted) quantum focusing conjecture (QFC), and is a statement about the energy-momentum tensor (EMT) of field theories in Minkowski space-time. It is a…

高能物理 - 理论 · 物理学 2026-01-28 Ido Ben-Dayan , Ayushi Srivastava

We discuss smooth metric measure spaces admitting two weighted Einstein representatives of the same weighted conformal class. First, we describe the local geometries of such manifolds in terms of certain Einstein and quasi-Einstein warped…

微分几何 · 数学 2025-04-11 Miguel Brozos-Vázquez , Eduardo García-Río , Diego Mojón-Álvarez