Abstract
We provide new information concerning the pseudospectra of the complex harmonic oscillator. Our analysis illustrates two different techniques for getting resolvent norm estimates. The first uses the JWKB method and extends for this particular potential some results obtained recently by E.B. Davies. The second relies on the fact that the bounded holomorphic semigroup generated by the complex harmonic oscillator is of Hilbert-Schmidt type in a maximal angular region. In order to show this last property, we deduce a non-self-adjoint version of the classical Mehler's formula.
Original language | English |
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Pages (from-to) | 413-429 |
Number of pages | 17 |
Journal | Journal of Operator Theory |
Volume | 47 |
Issue number | 2 |
Publication status | Published - 1 Mar 2002 |
Keywords
- Bounded holomorphic semigroups
- Complex harmonic oscillator
- JWKB method
- Mehler's formula
- Non-self-adjoint
- Pseudospectrum
- Resolvent norm estimates
ASJC Scopus subject areas
- Algebra and Number Theory