Spectral singularities and Bragg scattering in complex crystals
- 3 February 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 81 (2)
- https://doi.org/10.1103/physreva.81.022102
Abstract
Spectral singularities that spoil the completeness of Bloch-Floquet states may occur in non-Hermitian Hamiltonians with complex periodic potentials. Here an equivalence is established between spectral singularities in complex crystals and secularities that arise in Bragg diffraction patterns. Signatures of spectral singularities in a scattering process with wave packets are elucidated for a -symmetric complex crystal. DOI: http://dx.doi.org/10.1103/PhysRevA.81.022102 © 2010 The American Physical Society
Keywords
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