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PT-Symmetric Waveguides and the Lack of Variational Techniques
- 1.0384795 - ÚJF 2013 RIV CH eng J - Journal Article
Krejčiřík, David
PT-Symmetric Waveguides and the Lack of Variational Techniques.
Integral Equations and Operator Theory. Roč. 73, č. 1 (2012), s. 1-2. ISSN 0378-620X. E-ISSN 1420-8989
Institutional support: RVO:61389005
Keywords : Robin Laplacian * non-self-adjoint boundary conditions * complex symmetric operator * PT-symmetry * waveguides * discrete and essential spectra
Subject RIV: BA - General Mathematics
Impact factor: 0.713, year: 2012
On a model of waveguide with non-Hermitian Robin-type boundary conditions, we demonstrate the need for a robust method establishing the existence of isolated eigenvalues for non-self-adjoint operators possessing both essential and discrete spectrum.
Permanent Link: http://hdl.handle.net/11104/0214320
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