26 citations · 28 across the 5 of their papers we have counts for
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quant-ph2007
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…
quant-ph2006★ 1 cited
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…
quant-ph2004
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…