290 citations · 3.1k across the 87 of their papers we have counts for
6 papers · 1 filter
Degeneracies in a nonintegrable pairing model
J. Okolowicz, M. Ploszajczak, J. Dukelsky
The evolution pattern of exceptional points is studied in a non-integrable limit of the complex-extended 3-level Richardson-Gaudin model. The appearance of a pseudo-diabolic point…
Unexpected features of quantum degeneracies in a pairing model with two integrable limits
J. Dukelsky, J. Okolowicz, M. Ploszajczak
The evolution pattern of level crossings and exceptional points is studied in a non-integrable pairing model with two different integrable limits. One of the integrable limits has…
Features of exceptional points and the continuum spectroscopy
J. Okolowicz, M. Ploszajczak
We discuss observable features of exceptional points and the resonance spectroscopy of Ne using the Shell Model Embedded in the Continuum.
Coalescence of two exceptional points in the anti-hermitian 3-level pairing model
J. Dukelsky, J. Okolowicz, M. Ploszajczak
The formation of a higher-order singularity by the coalescence of two exceptional points is studied in the anti-hermitian limit of the complex-extended 3-level Richardson-Gaudin mo…
Shell Model in the Complex Energy Plane
N. Michel, W. Nazarewicz, M. Ploszajczak +1
This work reviews foundations and applications of the complex-energy continuum shell model that provides a consistent many-body description of bound states, resonances, and scatter…
Density matrix renormalization group approach to two-fluid open many-fermion systems
J. Rotureau, N. Michel, W. Nazarewicz +2
We have extended the density matrix renormalization group (DMRG) approach to two-fluid open many-fermion systems governed by complex-symmetric Hamiltonians. The applications are ca…