Divisibility of quantum dynamical maps and collision models

• Název česky: Faktorizace kvantových dynamických map a kolizní modely
• Autoři: FILIPPOV Sergey N.; PIILO Yirki; MANISCALCO Sabrina; ZIMAN Mário
• Rok publikování: 2017
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Physical Review A
• Fakulta / Pracoviště MU: Fakulta informatiky
• www: https://doi.org/10.1103/PhysRevA.96.032111
• Doi: http://dx.doi.org/10.1103/PhysRevA.96.032111
• Obor: Teoretická fyzika
• Klíčová slova: quantum dynamics - quantum simulation
• Popis: The divisibility of dynamical maps is visualized by trajectories in the parameter space and analyzed within the framework of collision models. We introduce ultimate completely positive (CP) divisible processes, which lose CP divisibility under infinitesimal perturbations, and characterize Pauli dynamical semigroups exhibiting such a property. We construct collision models with factorized environment particles, which realize additivity and multiplicativity of generators of CP divisible maps. A mixture of dynamical maps is obtained with the help of correlated environment. The mixture of ultimate CP divisible processes is shown to result in a class of eternal CP indivisible evolutions. We explicitly find collision models leading to weakly and essentially non-Markovian Pauli dynamical maps.

Související projekty

• Rényiho entropie v kvantovém zpracování informace