Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 30: Precision spectroscopy of atoms and ions (with Q)
A 30.1: Poster
Wednesday, March 2, 2016, 16:30–19:00, Empore Lichthof
Quantum Algorithmic Readout in Multi-Ion Clocks — •Marius Schulte1, Niels Lörch1, Ian D. Leroux2, Piet O. Schmidt2,3, and Klemens Hammerer1 — 1Institute for Theoretical Physics and Institute for Gravitational Physics (Albert-Einstein-Institute), Leibniz University Hannover, Callinstrasse 38, 30167 Hannover, Germany — 2QUEST Institut, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 3Institute for Quantum Optics, Leibniz University Hannover, Welfengarten 1, 30167 Hannover, Germany
The methods of quantum information theory have already found many applications in trapped ion technologies. Even today, new generations of ion clocks often rely on quantum logic readouts in order to reference to a specific optical transition. Thereby they use two ion species in the same trap to exploit their different properties. Guided by a quantum algorithm, we present a non-demolition measurement strategy to transfer excitation probabilities among the two species. This method can be used for clocks with larger ion crystals in order to improve their short term stability. Our approach scales favorable in the number of logic ions and entangling-gates needed for the information transfer. We also discuss a possible realization based on a five ion crystal with Al and Ca ions, taking the full normal mode spectrum into account.