Gaussian bounds for reduced heat kernels of subelliptic operators on nilpotent Lie groups

  • A. F. M. Ter Elst
  • Humberto Prado

Abstract

We obtain Gaussian estimates for the kernels of the semigroups generated by a class of subelliptic operators $H$ acting on $L_p(\boldsymbol R^k)$. The class includes anharmonic oscillators and Schrödinger operators with external magnetic fields. The estimates imply an $H_\infty$-functional calculus for the operator $H$ on $L_p$ with $p \in \langle 1,\infty\rangle$ and in many cases the spectral $p$-independence. Moreover, we show for a subclass of operators satisfying a homogeneity property that the Riesz transforms of all orders are bounded.
Published
2002-06-01
How to Cite
Elst, A. F. M. T., & Prado, H. (2002). Gaussian bounds for reduced heat kernels of subelliptic operators on nilpotent Lie groups. MATHEMATICA SCANDINAVICA, 90(2), 251-266. https://doi.org/10.7146/math.scand.a-14373
Section
Articles