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Q: Fachverband Quantenoptik und Photonik
Q 25: Quantum effects: Entanglement and decoherence II
Q 25.7: Vortrag
Dienstag, 18. März 2014, 15:30–15:45, DO24 1.101
Optimal control strategy for long distance entanglement in disordered spin chain — •Jian Cui1,2 and Florian Mintert1,2 — 1FRIAS, Albert Ludwigs University of Freiburg, Albertstr. 19, 79104 Freiburg, Germany — 2Department of Physics, Imperial College London, SW7 2AZ, United Kingdom
We derive temporally shaped control pulses for the creation of long- distance entanglement in disordered spin chains. Our approach is based on a time-dependent target functional and a time-local control strategy that permit to ensure that the description of the chain in terms of matrix product states (MPS) is always valid. With this approach, we demonstrate that long-distance entanglement can be created and maintained even for substantially disordered interaction landscapes.