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A: Fachverband Atomphysik

A 9: Ultra-cold atoms, ions and BEC (with Q)

A 9.28: Poster

Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof

Spectroscopy of Discrete Solitons in Coulomb Crystals — •Jonathan Brox¹, Miriam Bujak¹, Philip Kiefer¹, Isabelle Schmager¹, Haggai Landa², and Tobias Schaetz¹ — ¹Atom-, Molekül- und optische Physik, Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — ²LPTMS, Université Paris Sud, Orsay, France

We study structural defects (kinks) which are formed during the transition from a laser cooled cloud of Mg-Ions to a Coulomb crystal [1]. The occurrence of these structures is investigated in dependence of crystal size and axial as well as radial confinement.

Ion crystals with such structural defects feature localized vibrational modes in the spectrum of phonons [2]. We present first results on the spectroscopy of vibrational modes of the Coulomb crystal.

[1] M. Mielenz et al., Phys. Rev. Lett. 110, 133004 (2013)

[2] H. Landa et al., New J. Phys. 15, 093003 (2013)