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On the Spectra of R...
On the Spectra of Real and Complex Lamé Operators
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- Haese-Hill, W. A. (author)
- Loughborough University
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- Hallnäs, Martin, 1979 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för matematiska vetenskaper,Department of Mathematical Sciences,University of Gothenburg,Chalmers tekniska högskola,Chalmers University of Technology
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- Veselov, A. P. (author)
- Loughborough University
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(creator_code:org_t)
- 2017
- 2017
- English.
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In: Symmetry Integrability and Geometry-Methods and Applications. - 1815-0659. ; 13
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Abstract
Subject headings
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- We study Lame operators of the form with m is an element of N and omega a half- period of P(z). For rectangular period lattices, we can choose omega and z(0) such that the potential is real, periodic and regular. It is known after Ince that the spectrum of the corresponding Lame operator has a band structure with not more than m gaps. In the first part of the paper, we prove that the opened gaps are precisely the first m ones. In the second part, we study the Lame spectrum for a generic period lattice when the potential is complex- valued. We concentrate on the m = 1 case, when the spectrum consists of two regular analytic arcs, one of which extends to infinity, and briefly discuss the m = 2 case, paying particular attention to the rhombic lattices.
Subject headings
- NATURVETENSKAP -- Matematik (hsv//swe)
- NATURAL SCIENCES -- Mathematics (hsv//eng)
Keyword
- Lame operators
- finite-gap operators
- spectral theory
- non-self-adjoint operators
- hill equation
- quantization
- potentials
- Physics
- Lamé operators
Publication and Content Type
- ref (subject category)
- art (subject category)
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