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Trace formulas for Schrödinger operators with complex potentials (1712.09053v1)
Published 25 Dec 2017 in math.SP
Abstract: We consider 3-dim Schr\"odinger operators with a complex potential. We obtain new trace formulas. In order to prove these results we study analytic properties of a modified Fredholm determinant. In fact we reformulate spectral theory problems as the problems of analytic functions from Hardy spaces in upper half-plane.