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math-ph2022
Spectral branch points of the Bloch-Torrey operator
Nicolas Moutal, Denis S. Grebenkov
We investigate the peculiar feature of non-Hermitian operators, namely, the existence of spectral branch points (also known as exceptional or level crossing points), at which two (…
math-ph2020★ 8 cited
On the spectral properties of the Bloch-Torrey equation in infinite periodically perforated domains
Denis S. Grebenkov, Nicolas Moutal, Bernard Helffer
We investigate spectral and asymptotic properties of the particular Schrödinger operator (also known as the Bloch-Torrey operator), , in infinite periodically perforated…