Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 13: Precision Measurements and Metrology III (with A)

Q 13.5: Vortrag

Montag, 29. Februar 2016, 18:00–18:15, a310

Decoherence related limitation of light shift immune Ramsey schemes — •Sergey Kuznetsov^1,2, Nils Huntemann¹, Christian Sanner¹, Burghard Lipphardt¹, Christian Tamm¹, and Ekkehard Peik¹ — ¹Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — ²Institute of Laser Physics SB RAS, Novosibirsk 630090, Russia

Over the last years generalizations of Ramsey’s method of separated oscillatory fields were proposed that provide immunity to probe-induced frequency shifts [1-3]. They are of particular importance for optical clocks, based on strongly forbidden transitions, where the probe light field induces a significant light shift via non-resonant coupling to higher lying levels. We apply such a technique for our optical clock based on the ²S_1/2 ↔ ²F_7/2 transition of a single ¹⁷¹Yb⁺ ion stored in a radio-frequency Paul trap [4]. Heating of the ion’s motion during the probe period, however, degrades the cancellation of the light shift. We present a theoretical investigation of the effect and compare it with experimental data. We furthermore present a way to compensate for the effect of motional heating.
S.K. acknowledges the DAAD (German Academic Exchange Service) for financial support.
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