Stuttgart 2012 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 41: Quanteninformation: Atome und Ionen 1
Q 41.7: Vortrag
Donnerstag, 15. März 2012, 12:15–12:30, V7.02
Probing Quantum Superpositions of Ion Coulomb Crystals by Ramsey Interferometry — •Jens Domagoj Baltrusch1,2, Cecilia Cormick1, and Giovanna Morigi1 — 1Theoretische Physik, Universität des Saarlandes, Germany — 2Grup d’Optica, Universitat Autònoma de Barcelona, Spain
Recent progress in the creation and manipulation of many-body states of ion Coulomb crystals demands for detection techniques not only of the electronic but also the motional quantum states. Such states are used as a resource for quantum information processing, and were proposed for simulating quantum many-body Hamiltonians [1] as well as for the creation of crystalline cat-states [2,3]. We examine Ramsey interferometry to probe ion Coulomb crystals in state-dependent potentials, and develop a quantum theory for evaluating the overlap of the quantum states of the crystal, which determines the contrast of the Ramsey fringes.
We show that Ramsey interferometry can allow one to infer the details of the crystal dynamics at the linear-zigzag structural transition [4].
D. Porras, F. Marquardt, J. von Delft, and J. I. Cirac, Phys. Rev. A 78, 010101 (2008).
T. Pruttivarasin, M. Ramm, I. Talukdar, A. Kreuter, and H. Häffner, New J. Phys. 13, 075012 (2011).
J. D. Baltrusch, C. Cormick, G. De Chiara, T. Calarco, and G. Morigi, Phys. Rev. A 84, 063821 (2011).
G. Morigi and S. Fishman, Phys. Rev. E 70, 066141 (2004).