Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Quantum Information (Concepts and Methods) II
Q 15.1: Gruppenbericht
Montag, 5. März 2018, 14:00–14:30, K 1.019
Pushing the Limits of Reachable States by Optimal Control — •Thomas Schulte-Herbrüggen1, Ville Bergholm1,2, Frank K. Wilhelm3, and Michael Keyl4 — 1Technical University of Munich (TUM) — 2University of Helsinki — 3University of Saarbrücken — 4Dahlem Centre for Complex Quantum Systems, FU-Berlin
Resorting to optimal control methods often is key to achieving high fidelity in actual experiments. Examples meanwhile pertain to quantum information processing, quantum simulation, and quantum sensing.
Recently, we have extended our optimal-control platform dynamo by allowing for fast switchable noise on top of coherent controls. We suggested implementation by superconducting qudits (GMons) with tunable coupling to an open transmission line.
Here we show how to use these features as internal cooling device replacing measurement-based closed-loop feedback control for arbitrary interconversion between quantum states (pure or mixed). Finally, we give an outlook on further experimental implementations, where optimal control paves the way to achieving unprecedented states.