Showing quant-phShow all
2 papers · 1 filter
quant-ph2024
Effective eigenvalue approximation from moments for self-adjoint trace-class operators
Richárd Balka, Gábor Homa, András Csordás
Spectral properties of bounded linear operators play a crucial role in several areas of mathematics and physics. For each self-adjoint, trace-class operator we define a set $Λ_…
quant-ph2024
Positivity and entanglement of polynomial Gaussian integral operators
Richárd Balka, András Csordás, Gábor Homa
Positivity preservation is an important issue in the dynamics of open quantum systems: positivity violations always mark the border of validity of the model. We investigate the pos…