Hannover 2016 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 30: Quantum Information: Concepts and Methods V

Q 30.5: Talk

Wednesday, March 2, 2016, 12:00–12:15, e214

Collisional model approach to quantum memory effects — Silvan Kretschmer, •Kimmo Luoma, and Walter Strunz — Institut für Theoretische Physik, Technische Universität Dresden, Dresden, Germany

Collisional models offer an alternative route to open quantum system dynamics. A collision model consists of a system that interacts with localized environment particles in sequential manner. As such, in collisional models the dynamics is given discretely in time in terms of maps instead of usual continuous in time master equations. The description of the dynamics using sequential collisions is appealing because it guarantees the complete positivity of the open system dynamics by its construction.

A scenario where the system interacts at each collision with a new uncorrelated environment particle leads to dynamical map with semi-group structure, ie. to Markovian evolution.

In this work we construct a collisional model with an interaction between the environment particles. The interaction allows to propagate system environment correlations forward in time. With our construction we can simulate multimode Jaynes-Cummings model discretely in time and in the continuous time limit we can produce the well known analytical results.