Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 14: Precision Measurements and Metrology II (with A)

Q 14.6: Talk

Monday, March 23, 2015, 16:00–16:15, P/H1

Investigation of high-precision phase estimation in the presence of noise. — •Sanah Altenburg, Sabine Wölk, and Otfried Gühne — Department Physik, Universität Siegen, Siegen, Germany

Quantum correlation based measurement strategies can overcome classical precision bounds. However, quantum correlation are affected by noisy environments, which ruin the enhancement in precision.

In this talk, we discuss the effect of noisy environments in quantum metrology for different initial preparations of the measurement apparatus. We will concentrate on trapped ions as measurement apparatus. Typical decoherence processes in such systems are collective and distance dependent phase noise. For such decoherence processes, we investigate the maximally reachable precision and determine optimal probe states. Our results can help to improve the precision of experimental setups.