Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Optics IV
Q 33.6: Talk
Wednesday, March 25, 2015, 12:15–12:30, B/gHS
Two-dimensional spectroscopy for the study of ion Coulomb crystals — •Andreas Lemmer1, Cecilia Cormick1, Christian Tomás Schmiegelow2, Ferdinand Schmidt-Kaler2, and Martin Bodo Plenio1 — 1Institut für Theoretische Physik, Universität Ulm, Deutschland — 2QUANTUM Institut für Physik, Universität Mainz, Deutschland
Ion Coulomb crystals are currently establishing themselves as a highly controllable test-bed for mesoscopic systems of statistical mechanics. The detailed experimental interrogation of the dynamics of these crystals however remains an experimental challenge. In this work, we show how to extend the concepts of multi-dimensional nonlinear spectroscopy to the study of the dynamics of ion Coulomb crystals. The scheme we present can be realized with state-of-the-art technology and gives direct access to the dynamics, revealing nonlinear couplings even in systems with many ions and in the presence of thermal excitations. We illustrate the advantages of our proposal showing how two-dimensional spectroscopy can be used to detect signatures of a structural phase transition of the ion crystal, as well as resonant energy exchange between modes. Furthermore, we demonstrate in these examples how different decoherence mechanisms can be identified.