Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 59: Quantum Information (Concepts and Methods) V

Q 59.8: Vortrag

Freitag, 15. März 2019, 12:15–12:30, S HS 001 Chemie

Heat transport in a two-qubit collision model — •Daniel Heineken, Konstantin Beyer, Kimmo Luoma, and Walter T. Strunz — Technische Universität Dresden, Dresden, Germany

We investigate a collision model for a two-qubit system coupled to two thermal baths at different temperatures consisting of qubits in thermal states. Each environment couples to one of the system's qubits.

We analyse the steady state of the system's evolution for Markovian dynamics in which the system interacts with new, uncorrelated environmental qubits in each collision step. As expected, the heat flow between the two baths depends on the coupling strength between the system's qubits and the baths as well as on the temperature difference and shows a behaviour which agrees with our classical intuition. We find a parameter region where the steady state is entangled.

We modify the collision model by taking into account the effects of the earlier collisions between the system and environmental qubits. The impact of these memory effects on the steady state is considered. We find that heat flow as well as steady state entanglement are affected by the non-Markovian environments.