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Poisson wave trace formula for Dirac resonances at spectrum edges and applications

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Version 2 2023-06-07, 08:57
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journal contribution
posted on 2023-06-07, 08:57 authored by Bobby Cheng, Michael MelgaardMichael Melgaard
We study the self-adjoint Dirac operators D = D0 + V (x), where D0 is the free three-dimensional Dirac operator and V (x) is a smooth compactly supported Hermitian matrix potential. We define resonances of D as poles of the meromorphic continuation of its cut-off resolvent. By analyzing the resolvent behaviour at the spectrum edges ±m, we establish a generalized Birman-Krein formula, taking into account possible resonances at ±m. As an application of the new Birman-Krein formula we establish the Poisson wave trace formula in its full generality. The Poisson wave trace formula links the resonances with the trace of the difference of the wave groups. The Poisson wave trace formula, in conjunction with asymptotics of the scattering phase, allows us to prove that, under certain natural assumptions on V , the perturbed Dirac operator has infinitely many resonances; a result similar in nature to Melrose’s classic 1995 result for Schr¨odinger operators.

History

Publication status

  • Published

File Version

  • Published version

Journal

Asian Journal of Mathematics

ISSN

1093-6106

Publisher

International Press

Issue

2

Volume

25

Page range

243-276

Department affiliated with

  • Mathematics Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2020-09-01

First Open Access (FOA) Date

2021-11-02

First Compliant Deposit (FCD) Date

2020-08-30

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