3 papers
quant-ph2026
An exact Markovian decoherence dynamics of two interacting harmonic oscillators coupled to a bosonic heat bath
Gábor Homa, Dávid Hamar, József Zsolt Bernád +2
We present an exact analytical solution of the Hu-Paz-Zhang master equation in a precise Markovian limit for a system of two harmonically coupled harmonic oscillators interacting w…
quant-ph2025
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 $Î…
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…