Using complex scaling on a 1D scattering Hamiltonian, the authors realize an exceptional point from resonance-continuum coalescence and derive the associated Berry phase and Chern characteristic.
Non-perturbative formulation of resonances in quantum mechanics based on exact wkb method,
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Geometric phase from encircling an exceptional point of a quantum resonance in the complex-scaling method
Using complex scaling on a 1D scattering Hamiltonian, the authors realize an exceptional point from resonance-continuum coalescence and derive the associated Berry phase and Chern characteristic.