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It has been suggested that the volume dependence of the spectral weight could be utilized to distinguish single and multi-particle states in Monte Carlo simulations. In a recent study using a solvable model, the Lee model, we found that…

高能物理 - 格点 · 物理学 2010-01-08 Zhi-Yuan Niu , Ming Gong , Chuan Liu , Yan Shen

We calculate the zero-temperature self-energy to fourth-order perturbation theory in the Hubbard interaction $U$ for the half-filled Hubbard model in infinite dimensions. For the Bethe lattice with bare bandwidth $W$, we compare our…

强关联电子 · 物理学 2009-11-10 Florian Gebhard , Eric Jeckelmann , Sandra Mahlert , Satoshi Nishimoto , Reinhard M. Noack

In this paper, we investigate an extension of the standard $\Lambda$CDM model by allowing: a temporal evolution in the equation of state (EoS) of DM via Chevallier-Polarski-Linder parametrization, and the constant non-null sound speed. We…

宇宙学与河外天体物理 · 物理学 2023-10-30 Vikrant Yadav , Santosh Kumar Yadav , Anil Kumar Yadav

We study analytically the dynamics of a $d$-dimensional Klein-Gordon lattice with periodic boundary conditions, for $d \leq 3$. We consider initial data supported on one low-frequency Fourier mode. We show that, in the continuous…

动力系统 · 数学 2024-11-05 Stefano Pasquali

Assuming the Generalized Riemann Hypothesis, the non-trivial zeros of $L$-functions lie on the critical line with the real part $1/2$. We find an upper bound of the lowest first zero in families of even cuspidal newforms of prime level…

数论 · 数学 2024-05-21 Xueyiming Tang , Steven J. Miller

We study the equation of state (EoS) of a neutron star (NS) accounting for new advances. In the low energy density, $n\leq 0.1 n_s$, with $n_s$ the saturation density, we use a new pure neutron matter EoS that is regulator independent and…

核理论 · 物理学 2024-10-22 J. M. Alarcón , E. Lope-Oter , J. A. Oller

Let f be an $L^2$-normalized weight zero Hecke-Maass cusp form of square-free level N, character $\chi$ and Laplacian eigenvalue $\lambda\geq 1/4$. It is shown that $\| f \|_{\infty} \ll_{\lambda} N^{-1/37}$, from which the hybrid bound…

数论 · 数学 2015-05-13 Valentin Blomer , Roman Holowinsky

We prove quantitative scattering for the three-dimensional defocusing energy-critical quintic wave equation on a class of asymptotically flat, possibly non-stationary perturbations of Minkowski space, by establishing the first explicit…

偏微分方程分析 · 数学 2026-03-23 Benjamin Dodson , Sam Looi

We study the conformal wave equation $\square_g \psi + \frac{2}{l^2} \psi = 0$ on 4-dimensional Schwarzschild--Anti de Sitter spacetimes under dissipative boundary conditions. We prove boundedness and decay of the non-degenerate energy of…

广义相对论与量子宇宙学 · 物理学 2026-05-29 Alex Tullini

This work presents technical details of determining the finite-volume energy spectra for the scattering amplitude of the coupled-channel $\pi\Sigma - \bar{K}N$ from lattice QCD data. The importance of reliably extracting such spectra lies…

For various compactly supported perturbations of the Laplacian in odd dimensions $n$, we prove a sharp upper bound of the resonance counting function $N(r)$ of the type $N(r) \le A_n r^n(1+o(1))$ with an explicit constant $A_n$. In a few…

偏微分方程分析 · 数学 2007-05-23 Plamen Stefanov

We construct near-optimal coresets for kernel density estimates for points in $\mathbb{R}^d$ when the kernel is positive definite. Specifically we show a polynomial time construction for a coreset of size $O(\sqrt{d}/\varepsilon\cdot…

机器学习 · 计算机科学 2019-04-15 Jeff M. Phillips , Wai Ming Tai

In this work, we consider the energy-supercritical defocusing cubic nonlinear wave equation in dimension d=5 for radially symmetric initial data. We prove that an a priori bound in the critical space implies global well-posedness and…

偏微分方程分析 · 数学 2015-07-22 Aynur Bulut

We prove that the ground state energy of an atom confined to two dimensions with an infinitely heavy nucleus of charge $Z>0$ and $N$ quantum electrons of charge -1 is $E(N,Z)=-{1/2}Z^2\ln Z+(E^{\TF}(\lambda)+{1/2}c^{\rm H})Z^2+o(Z^2)$ when…

数学物理 · 物理学 2011-06-17 Phan Thanh Nam , Fabian Portmann , Jan Philip Solovej

We present numerical simulations of the defocusing nonlinear Schrodinger (NLS) equation with an energy supercritical nonlinearity. These computations were motivated by recent works of Kenig-Merle and Kilip-Visan who considered some energy…

偏微分方程分析 · 数学 2009-08-17 J. Colliander , G. Simpson , C. Sulem

A heterostructure composed of two parallel homogeneous layers is studied in the limit as their widths $l_1$ and $l_2$, and the distance between them $r$ shrinks to zero simultaneously. The problem is investigated in one dimension and the…

量子物理 · 物理学 2020-12-22 Alexander V. Zolotaryuk , Yaroslav Zolotaryuk

In this study, we consider the nonlinear Sch\"odinger equation (NLS) with the zero-boundary condition on a two- or three-dimensional large finite cubic lattice. We prove that its solution converges to that of the NLS on the entire Euclidean…

偏微分方程分析 · 数学 2022-02-22 Younghun Hong , Chulkwang Kwak , Changhun Yang

We investigate the phase structure and the equation of state (EoS) for dense two-color QCD (QC$_2$D) at low temperature ($T = 40$ MeV, $32^4$ lattice) for the purpose of extending our previous works~\cite{Iida:2019rah, Iida:2022hyy} at…

高能物理 - 格点 · 物理学 2024-07-25 Kei Iida , Etsuko Itou , Kotaro Murakami , Daiki Suenaga

We consider the ideal Fermi gas of indistinguishable particles without spin but with electric charge, confined to a Euclidean plane $\mathbb R^2$ perpendicular to an external constant magnetic field of strength $B>0$. We assume this…

数学物理 · 物理学 2023-03-01 Hajo Leschke , Alexander V. Sobolev , Wolfgang Spitzer

By using the asymptotic theory of Pemantle and Wilson, exact asymptotic expansions of the free energy of the monomer-dimer model on rectangular $n \times \infty$ lattices in terms of dimer density are obtained for small values of $n$, at…

统计力学 · 物理学 2024-05-03 Yong Kong