A Simplified Calculation for the Fundamental Solution to the Heat Equation on the Heisenberg Group

Details A Simplified Calculation for the Fundamental Solution to the Heat Equation on the Heisenberg Group A Simplified Calculation for the Fundamental Solution to the Heat Equation on the Heisenberg Group

2007-11-26

arxiv.org/abs/0711.4117v1

Proc. Amer. Math. Soc. 137 (2009), no. 3, 937--944

Mathematics

Analysis of PDEs

8 pages

Scientific paper

Let $L = -1/4 (\sum_{j=1}^n(X_j^2+Y_j^2)+i\gamma T)$ where $\gamma$ is a complex number, $X_j$, $Y_j$, and $T$ are the left invariant vector fields of the Heisenberg group structure for $R^n \times R^n \times R$. We explicitly compute the Fourier transform (in the spatial variables) of the fundamental solution of the Heat Equation $\partial_s\rho = -L\rho$. As a consequence, we have a simplified computation of the Fourier transform of the fundamental solution of the $\Box_b$-heat equation on the Heisenberg group and an explicit kernel of the heat equation associated to the weighted dbar-operator in $C^n$ with weight $\exp(-\tau P(z_1,...,z_n))$ where $P(z_1,...,z_n) = 1/2(x_1^2 + >... x_n^2)$, $z_j=x_j+iy_j$, and $\tau\in R$.

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