Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 25: Quantum effects: Entanglement and decoherence II

Q 25.6: Talk

Tuesday, March 18, 2014, 15:15–15:30, DO24 1.101

Stabilizing Open Systems via Continuous Monitoring — •Tobias Brünner, Clemens Gneiting, and Andreas Buchleitner — Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg

The screening of quantum properties such as coherence and entanglement against detrimental environmental noise is a key issue in quantum technologies. While coherent control techniques are now well-established, it has been shown that they can stabilize only a limited degree of coherence. We investigate to what extent continuous monitoring and unitary feedback can enhance the desired quantum properties. To this end, we monitor single qubit quantum trajectories in the presence of spontaneous decay. We find that - in contrast to unmonitored systems - arbitrary pure states can be stabilized.