First- and second-order formulas for pole shifts, projector corrections, and transition amplitudes for time-dependent renormalized point interactions in discrete-spectrum systems.
Schr¨ odinger equation with moving point interactions in three dimensions,
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Perturbation Theory for Time-dependent Singular Quantum Systems
First- and second-order formulas for pole shifts, projector corrections, and transition amplitudes for time-dependent renormalized point interactions in discrete-spectrum systems.