Mainz 2017 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster Session I

A 20.10: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1

Spectroscopy of discrete solitons in Coulomb crystals — •Miriam Bujak¹, Jonathan Brox¹, Philip Kiefer¹, 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 (solitons) which are formed during laser triggered first order phase transition from a cloud of Mg-ions to a Coulomb crystal in a Paul trap [1]. The formation of kink configurations as well as the lifetime of such structural defects are experimentally investigated. We study the dependence on parameters, such as laser cooling (-Γ/2) and heating (+Γ/10) rate, the duration of the process to optimize the kink creation propability and explore the relevant time scales of the formation mechanism during the phase transition. We present first results of kink spectroscopy, i.e. of localized vibrational eigenmodes of the Coulomb crystal [2].

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

[2] J. Brox et al., in preparation