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19982007
most citedOn the existence of solutions to the operator Riccati equation and the tanΘtheorem

30 citations · 64 across the 6 of their papers we have counts for

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math-ph1998

Operator interpretation of resonances arising in spectral problems for 2x2 matrix Hamiltonians

A. K. Motovilov, R. Mennicken

We consider the analytic continuation of the transfer function for a 2x2 matrix Hamiltonian into the unphysical sheets of the energy Riemann surface. We construct non-selfadjoint o…