Logarithmic Sobolev inequalities on non-isotropic Heisenberg groups
Logarithmic Sobolev inequalities on non-isotropic Heisenberg groups
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DOI：
10.1016/j.jfa.2022.109500
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发表时间：
2021-05
影响因子：
1.7
通讯作者：
M. Gordina;Liangbing Luo
中科院分区：
文献类型：
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作者：
M. Gordina;Liangbing Luo
研究了有限维和无限维Heisenberg群上关于热核测度的对数Sobolev不等式。这样的群是次黎曼流形的最简单的非平凡例子。首先，我们考虑非迷向海森堡群上的对数Sobolev不等式。这些不等式被认为是相对于亚椭圆热核措施，我们表明，对数Sobolev常数可以被选择为独立的底层空间的维度。在这种情况下，自然拉普拉斯算子不是椭圆算子，而是次椭圆算子。该论点依赖于比较对数Sobolev常数的三维非各向同性和各向同性海森堡群，和张量化的对数Sobolev不等式在次黎曼设置。此外，我们将这些结果应用到无限维的设置，并证明了一个对数Sobolev不等式上的无限维海森堡群建模的抽象Wiener空间。
We study logarithmic Sobolev inequalities with respect to a heat kernel measure on finite-dimensional and infinite-dimensional Heisenberg groups. Such a group is the simplest non-trivial example of a sub-Riemannian manifold. First we consider logarithmic Sobolev inequalities on non-isotropic Heisenberg groups. These inequalities are considered with respect to the hypoelliptic heat kernel measure, and we show that the logarithmic Sobolev constants can be chosen to be independent of the dimension of the underlying space. In this setting, a natural Laplacian is not an elliptic but a hypoelliptic operator. The argument relies on comparing logarithmic Sobolev constants for the three-dimensional non-isotropic and isotropic Heisenberg groups, and tensorization of logarithmic Sobolev inequalities in the sub-Riemannian setting. Furthermore, we apply these results in an infinite-dimensional setting and prove a logarithmic Sobolev inequality on an infinite-dimensional Heisenberg group modeled on an abstract Wiener space.