Hannover 2016 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 23: Quantum Information: Concepts and Methods IV

Q 23.5: Talk

Tuesday, March 1, 2016, 15:30–15:45, e214

Non-equidistant dynamical decoupling and weighted Cesàro means — •József Zsolt Bernád — Institut für Angewandte Physik, TU Darmstadt, Germany

Dynamical decoupling is a method which decouples quantum systems from their environments and increases the coherence times of the quantum states. One possibility to optimize the suppression of the decoherence is to use non-equidistant pulse sequences, like Uhrig’s dynamical decoupling scheme. We investigate this problem from a general point of view and relate to ergodic theorems and weighted Cesàro means. We show that in the limit of continuous control the suppression mechanism becomes independent from the non-equidistant timing of the pulses. In the case of finite number of pulses an inequality is derived and within this approach the non-equidistant application of the pulses is optimized.