Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Quantum Effects: Interference and Correlations
Q 59.1: Talk
Friday, March 18, 2011, 10:30–10:45, SCH A01
Measuring Quantum Superpositions of Different Structures of Ion Coulomb Crystals — •Jens Domagoj Baltrusch1,2, Gabriele De Chiara2,3, Tommaso Calarco4, and Giovanna Morigi1,2 — 1Theoretische Quantenphysik, Universität des Saarlandes, Germany — 2Grup d'Òptica, Universitat Autònoma de Barcelona, Spain — 3Física Teòrica: Informació i Fenòmens Quàntics, Universitat Autònoma de Barcelona, Spain — 4Institut für Quanteninformationsverarbeitung, Universität Ulm, Germany
We study the creation of quantum superposition states of different structural configurations in small ion Coulomb crystals by utilizing state-dependent potentials. In particular, we focus on the creation of a superposition between an ion crystal in the zigzag stable state and in the linear quantum ground state. The structural properties can be measured with the help of Ramsey interferometry [De Chiara et al. PRA 78, 043414 (2008)], whereby the visibility as a function of the time between the Ramsey pulses carries information about the autocorrelation function of the crystal. We present calculations of the visibility signal for different possible preparation methods, and discuss their experimental feasibility.