Potential Analysis

, Volume 7, Issue 1, pp 415–436 | Cite as

The Spectral Function and Principal Eigenvalues for Schrödinger Operators

  • Wolfgang Arendt
  • Charles J. K. Batty


Let m ∈ \(L_{loc}^1 (\mathbb{R}^N ) \), 0 ≠ m+ in Kato's class. We investigate the spectral function λ ↦ s(Δ + λm) where s(Δ + λm) denotes the upper bound of the spectrum of the Schrödinger operator Δ + λm. In particular, we determine its derivative at 0. If m- is sufficiently large, we show that there exists a unique λ1 > 0 such that s(Δ + λ1m) = 0. Under suitable conditions on m+ it follows that 0 is an eigenvalue of Δ + λ1m with positive eigenfunction.

Principal eigenvalue Schrödinger semigroup exponential stability spectral bound Brownian motion. 


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© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Wolfgang Arendt
  • Charles J. K. Batty

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