Three circles theorems for Schrödinger operators on cylindrical ends and geometric applications

Abstract

Abstract We show that for a Schrödinger operator with bounded potential on a manifold with cylindrical ends, the space of solutions that grows at most exponentially at infinity is finite dimensional and, for a dense set of potentials (or, equivalently, for a surface for a fixed potential and a dense set of metrics), the constant function 0 is the only solution that vanishes at infinity. Clearly, for general potentials there can be many solutions that vanish at infinity. One of the key ingredients in these results is a three circles inequality (or log convexity inequality) for the Sobolev norm of a solution u to a Schrödinger equation on a product N × [0, T ], where N is a closed manifold with a certain spectral gap. Examples of such N 's are all (round) spheres 𝕊 n for n ≥ 1 and all Zoll surfaces. Finally, we discuss some examples arising in geometry of such manifolds and Schrödinger operators.© 2007 Wiley Periodicals, Inc.

Locations

• Communications on Pure and Applied Mathematics - View
• arXiv (Cornell University) - View - PDF
• Zurich Open Repository and Archive (University of Zurich) - View - PDF