933 citations · 1.9k across the 30 of their papers we have counts for
30 papers
Complex-scaled no-core shell model calculations of bound and unbound nuclear states in light nuclei
A. T. Kruppa, N. Michel, Xin-le Shang +1
The complex scaling method is commonly used to describe decaying states, but its applications are limited because the Hamiltonian operator must contain only relative coordinates. T…
Mode entanglement and isospin pairing in two-nucleon systems
J Kovács, A T Kruppa, Ö Legeza +1
In this study, we explore the entanglement and correlation in two-nucleon systems using isospin formalism. With the help of Slater decomposition, we derive analytical expressions f…
Combining the in-medium similarity renormalization group with the density matrix renormalization group: Shell structure and information entropy
A. Tichai, S. Knecht, A. T. Kruppa +5
We propose a novel many-body framework combining the density matrix renormalization group (DMRG) with the valence-space (VS) formulation of the in-medium similarity renormalization…
Entanglement and seniority
J. Kovács, A. T. Kruppa, P. Salamon +2
We study mode-entanglement in the seniority model, derive analytic formulas for the one-body reduced density matrix of states with seniority , and , and also det…
Entanglement and correlation in two-nucleon systems
A T Kruppa, J Kovács, P Salamon +1
We examine the mode entanglement and correlation of two fermionic particles. We study the one- and two-mode entropy and a global characteristic, the one-body entanglement entropy.…
Description of two-electron atoms with correct cusp conditions
A. T. Kruppa, J. Kovács, I. Hornyak
New sets of functions with arbitrary large finite cardinality are constructed for two-electron atoms. Functions from these sets exactly satisfy the Kato's cusp conditions. The new…