336 citations · 858 across the 16 of their papers we have counts for
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math-ph2007★ 101 cited
Projective Hilbert space structures at exceptional points
Uwe Guenther, Ingrid Rotter, Boris F. Samsonov
A non-Hermitian complex symmetric 2x2 matrix toy model is used to study projective Hilbert space structures in the vicinity of exceptional points (EPs). The bi-orthogonal eigenvect…
physics.geo-ph2007★ 23 cited
Reversals in nature and the nature of reversals
Frank Stefani, Mingtian Xu, Luca Sorriso-Valvo +2
The asymmetric shape of reversals of the Earth's magnetic field indicates a possible connection with relaxation oscillations as they were early discussed by van der Pol. A simple m…