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arXiv 1405.0171math.AP
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关于具有软势的齐次Landau方程到平衡点的收敛速率

On the rate of convergence to equilibrium for the homogeneous Landau equation with soft potentials

Kleber Carrapatoso

摘要:

本文研究了具有软势的空间齐次Landau方程的解收敛到平衡点的收敛速率。首先,我们用熵方法证明了一个多项式的时间收敛性,并给出了新的先验估计。最后,我们证明了一个指数的时间收敛到平衡的最佳速率由相关的线性化运营商的谱间隙,结合新的衰减估计所产生的加权$L^p$ -空间的线性化Landau运营商togheter与上述多项式衰减的半群。

英文摘要:

We investigate in this work the rate of convergence to equilibrium of solutions to the spatially homogeneous Landau equation with soft potentials. Firstly, we prove a polynomial in time convergence using an entropy method with some new a priori estimates. Finally we prove an exponential in time convergence towards the equilibrium with the optimal rate given by the spectral gap of the associated linearized operator, combining new decay estimates for the semigroup generated by the linearized Landau operator in weighted $L^p$-spaces togheter with the polynomial decay described above.

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