Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 9: Ultra-cold atoms, ions and BEC (with Q)
A 9.27: Poster
Monday, February 29, 2016, 16:30–19:00, Empore Lichthof
Lifetime Measurements of Topological Defects in Coulomb Crystals — •Miriam Bujak1, Jonathan Brox1, 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) of Mg-Ions in Coulomb crystals. Simulations reveal a strong anharmonicity of the kink’s internal mode of vibration, further enhanced by the controlled extension into three dimensions. As a consequence, the discrete kink experiences a self-induced globally confining potential, capable of trapping it at the centre of the crystal.
The formation of kink configurations in dependence of the trapping parameters is investigated and the lifetime of these defects is explored.
[1] M. Mielenz et al., Phys. Rev. Lett. 110, 133004 (2013)