Drift in phase space: a new variational mechanism with optimal diffusion time

带有粗糙漂移项的传输-扩散方程的全局温和解

Global mild solutions for a transport-diffusion equation with a rough drift

研究在临界条件下，构造带有粗糙Calderón-Zygmund算子的传输-扩散方程的全局温和解，采用关键方法解决粗糙漂移项的挑战。

Drift diffusion equations with fractional diffusion on compact Lie groups

In this work we investigate the well-posedness for difussion equations associated to subelliptic pseudo-differential operators on compact Lie groups. The diffusion by strongly elliptic operators is considered as a special case and in particular the fractional diffusion with respect to the Laplacian. The general case is studied within the Hörmander classes associated to a sub-Riemannian structure on the group (encoded by a Hörmander system of vector fields). Applications to diffusion equations for fractional sub-Laplacians, fractional powers of more general subelliptic operators, and the corres…

有界区域上的对数 Sobolev 不等式及其在漂移-扩散方程中的应用

Logarithmic Sobolev Inequalities for Bounded Domains and Applications to Drift-Diffusion Equations

本文提出新型 Gagliardo-Nirenberg 型插值不等式，据此建立高维有界光滑区域上的对数 Sobolev 不等式，并用于证明非线性非局部漂移-扩散模型解指数收敛至常数稳态。

Drift-diffusion equations on domains in $\mathbb{R}^d$: essential self-adjointness and stochastic completeness

We consider the problem of quantum and stochastic confinement for drift-diffusion equations on domains $ Ω\subset \mathbb R^d$. We obtain various sufficient conditions on the behavior of the coefficients near the boundary of $Ω$ which ensure the essential self-adjointness or stochastic completeness of the symmetric form of the drift-diffusion operator, $-\frac{1}{ρ_\infty}\,\nabla\cdot ρ_\infty\mathbb D\nabla$. The proofs are based on the method developed in [29] for quantum confinement on bounded domains in $\mathbb R^d$. In particular for stochastic confinement we combine the Liouville prope…

Weak anisotropic Hardy inequality: essential self-adjointness of drift-diffusion operators on domains in $\mathbb{R}^d$, revisited

We consider the problem of essential self-adjointness of the drift-diffusion operator $H=-\frac{1}ρ\nabla\cdot ρ\mathbb D\nabla +V$ on domains $Ω\subset \mathbb{R}^d$ with $\mathcal{C}^2$-boundary $\partial Ω$ and for large classes of coefficients $ρ,\; \mathbb{D}$ and $V$. We give criteria showing how the behavior as $x \rightarrow \partial Ω$ of these coefficients balances to ensure essential self-adjointness of $H$. On the way we prove a weak anisotropic Hardy inequality which is of independent interest.