1.5k citations · 3.7k across the 20 of their papers we have counts for
20 papers
An effective interaction at the Planck mass and Planck length
WD Heiss
A simple model is suggested by assuming an effective interaction at the crossing point of the two curves, the Schwarzschild radius and the Compton wave length, that is at the Planc…
A model of three coupled wave guides and third order exceptional points
W D Heiss, G Wunner
A -symmetric model for three interacting wave guides is investigated. Each wave guide is represented by an attractive -function potential being in equidistant positi…
Spectral singularities in PT-symmetric Bose-Einstein condensates
W. D. Heiss, H. Cartarius, G. Wunner +1
We consider the model of a PT-symmetric Bose-Einstein condensate in a delta-functions double-well potential. We demonstrate that analytic continuation of the primarily non-analytic…
The physics of exceptional points
W. D. Heiss
A short resume is given about the nature of exceptional points (EPs) followed by discussions about their ubiquitous occurrence in a great variety of physical problems. EPs feature…
Non-Hermitian Hamiltonians, Metric, Other Observables and Physical Implications
H. B. Geyer, W. D. Heiss, F. G. Scholtz
The metric associated with a quasi-Hermitian Hamiltonian and its physical implications are scrutinised. Consequences of the non-uniqueness such as the question of the probability i…
Instabilities, nonhermiticity and exceptional points in the cranking model
W. D. Heiss, R. G. Nazmitdinov
A cranking harmonic oscillator model, widely used for the physics of fast rotating nuclei and Bose-Einstein condensates, is re-investigated in the context of PT-symmetry. The insta…