26 citations · 28 across the 5 of their papers we have counts for
5 papers
Network representation of cardiac interbeat intervals for monitoring restitution of autonomic control for heart transplant patients
Danuta Makowiec, Stanisław Kryszewski, Beata Graff +6
The aim is to present the ability of a network of transitions as a nonlinear tool providing a graphical representation of a time series. This representation is used for cardiac RR-…
Stratificational and antipodean properties of boundary states for N x N density matrices
S Kryszewski, M Zachciał, Ł Szparaga
We investigate the space of N x N dimensional density matrices. We show that there exist strata such that boundary states ρ_{p} with p zero eigenvalues lie on or outside the sphere…
Alternative representation of N \times N density matrix
Stanislaw Kryszewski, Mateusz Zachcial
We use polarization operators known from quantum theory of angular momentum to expand the dimensional density operators. Thereby, we construct generalized Bloch vector…
On the positivity of Bloch-Boltzmann equations
Stanislaw Kryszewski, Justyna Czechowska
In a large variety of spectroscopical applications Bloch-Boltzmann equations (BBE) play an essential role. They describe the evolution of the reduced density operator of an active…
Completely Positive Bloch-Boltzmann Equations
Robert Alicki, Stanisław Kryszewski
The density operator of the arbitrary physical system must be positive definite. Employing the general master equation technique which preserves this property we derive equations o…