Coherence properties of highly-excited motional states of a trapped ion

Abstract

We present a study of the coherence properties of a variety of motional states of a single ion confined in a Penning ion trap. We demonstrate that the motion of the ion has a coherence time of the order of one second, using Ramsey interferometry. We introduce a technique for preparing the ion in an incoherent superposition of highly-excited motional states using a simple modification of optical sideband cooling. Coherent manipulation of these states allow measurements of optical and motional coherence to be carried out. We show that these highly-excited motional state superpositions have long coherence times despite the incoherent preparation of the states. Such states can be useful for sensitive motional dephasing measurements.

18 pages, 8 figures

References in corpus (8)

• Quantum computing with trapped ions
• Optimized Dynamical Decoupling in a Model Quantum Memory
• Scaling and Suppression of Anomalous Quantum Decoherence in Ion Traps
• Suppression of Heating Rates in Cryogenic Surface-Electrode Ion Traps
• Ultrasensitive force and displacement detection using trapped ions
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• General Approach to Error Detection of Bosonic Codes via Phase Estimation