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In the sub-Riemannian manifolds, on the one hand, following Baudoin-Garofalo \cite{BaudoinGarofalo}, the upper bound for heat kernels associated to a class of locally subelliptic operators are given under the generalized curvature-dimension…

Mathematical Physics · Physics 2013-08-29 Huai Qian LI

We show a diffusive upper bound on the transition probability of a tagged particle in the symmetric simple exclusion process. The proof relies on optimal spectral gap estimates for the dynamics in finite volume, which are of independent…

Probability · Mathematics 2018-04-27 Arianna Giunti , Yu Gu , Jean-Christophe Mourrat

We give an introduction to the heat kernel technique and zeta function. Two applications are considered. First we derive the high temperature asymptotics of the free energy for boson fields in terms of the heat kernel expansion and zeta…

High Energy Physics - Theory · Physics 2009-11-10 Valery N. Marachevsky

In this paper some techniques useful to perform quantum field theory computations in a covariant manner are reviewed. In particular the background field gauge, the zeta function regularization and the heat kernel approach are highlighted.…

High Energy Physics - Theory · Physics 2022-04-21 Enrique Alvarez , Jesus Anero

This paper provides explicit pointwise formulas for the heat kernel on compact metric measure spaces that belong to a $(\mathbb{N}\times\mathbb{N})$-parameter family of fractals which are regarded as projective limits of metric measure…

Probability · Mathematics 2018-09-26 Patricia Alonso Ruiz

The heat kernel expansion on even-dimensional hyperbolic spaces is asymptotic at both short and long times, with interestingly different Borel properties for these short and long time expansions. Resummations in terms of incomplete gamma…

High Energy Physics - Theory · Physics 2023-05-31 Gerald V. Dunne

We derive large time upper bounds for heat kernels on vector bundles of differential forms on a class of non-compact Riemannian manifolds under certain curvature conditions.

Differential Geometry · Mathematics 2007-05-23 Thierry Coulhon , Qi S. Zhang

We establish heat kernel and gradient estimates for the density of kinetic degenerate Kolmogorov stochastic differentia equations. Our results are established under somehow minimal assumptions that guarantee the SDE is weakly well posed.

Analysis of PDEs · Mathematics 2022-03-23 P Chaudru de Raynal , S Menozzi , A Pesce , X Zhang

We derive all heat kernel coefficients for Laplacians acting on scalars, vectors, and tensors on fully symmetric spaces, in any dimension. Final expressions are easy to evaluate and implement, and confirmed independently using spectral sums…

High Energy Physics - Theory · Physics 2020-07-02 Yannick Kluth , Daniel F. Litim

We give sharp estimates for the heat kernel of the fractional Laplacian with Dirichlet condition for a general class of domains including Lipschitz domains.

Probability · Mathematics 2010-11-08 Krzysztof Bogdan , Tomasz Grzywny , Michał Ryznar

The purpose of this article is to establish upper and lower estimates for the integral kernel of the semigroup exp(-tP) associated to a classical, strongly elliptic pseudodifferential operator P of positive order on a closed manifold. The…

Analysis of PDEs · Mathematics 2014-11-04 Heiko Gimperlein , Gerd Grubb

Using index-free notation, we present the diagonal values of the first five heat kernel coefficients associated with a general Laplace-type operator on a compact Riemannian space without boundary. The fifth coefficient appears here for the…

High Energy Physics - Theory · Physics 2014-11-18 Anton E. M. van de Ven

By making use of the potentials of the heat conduction equation the integral equations are derived which determine the heat kernel for the Laplace operator $-a^2\Delta$ in the case of compound media. In each of the media the parameter $a^2$…

High Energy Physics - Theory · Physics 2008-11-26 I. G. Pirozhenko , V. V. Nesterenko , M. Bordag

I give a short guide into applications of the heat kernel technique to string/brane physics with an emphasis on the emerging boundary value problems.

High Energy Physics - Theory · Physics 2009-11-07 Dmitri V. Vassilevich

We derive estimates of the derivatives of the heat kernel on noncompact symmetric spaces and on locally symmetric spaces. Applying these estimates we study the $L^{p}$-boundedness of Littlewood-Paley-Stein operators and the Laplacian of the…

Analysis of PDEs · Mathematics 2020-06-18 A. Fotiadis , E. Papageorgiou

A method for calculation of the DWSG coefficients for operators in spaces with metric incompatible with connection is suggested based on a generalization of the pseudodifferential operators technique. By using the proposed method, the…

High Energy Physics - Theory · Physics 2007-05-23 E. V. Gorbar , V. A. Kushnir

We give an asymptotic expansion of the relative entropy between the heat kernel $q_Z(t,z,w)$ of a compact Riemannian manifold $Z$ and the normalized Riemannian volume for small values of $t$ and for a fixed element $z\in Z$. We prove that…

Differential Geometry · Mathematics 2022-09-26 Vlado Menkovski , Jacobus W. Portegies , Mahefa Ratsisetraina Ravelonanosy

Using time dependent Lyapunov functions, we prove pointwise upper bounds for the heat kernels of some nonautonomous Kolmogorov operators with possibly unbounded drift and diffusion coefficients and a possibly unbounded potential term.

Analysis of PDEs · Mathematics 2014-01-13 Markus Kunze , Luca Lorenzi , Abdelaziz Rhandi

We introduce a method of constructing a general Laakso space while calculating the spectrum and multiplicities of the Laplacian operator on it. Using this information, we found the leading term of the trace of the heat kernel of a Laakso…

Classical Analysis and ODEs · Mathematics 2010-02-25 Matthew Begue , Levi DeValve , David Miller , Benjamin Steinhurst

In this letter we present the calculation of the $a_{5}$ heat kernel coefficient of the heat operator trace for a partial differential operator of Laplace type on a compact Riemannian manifold with Dirichlet and Robin boundary conditions.

High Energy Physics - Theory · Physics 2010-04-06 Klaus Kirsten