Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 1: Ultra-cold atoms, ions and BEC I (with Q)
A 1.8: Vortrag
Montag, 17. März 2014, 12:15–12:30, BEBEL E34
Analogue of Cosmological Particle Creation in an Ion Trap — •Christian Fey1, Tobias Schaetz2, and Ralf Schützhold1 — 1Universität Duisburg-Essen, Duisburg, Deutschland — 2Albert-Ludwigs-Universität, Freiburg, Deutschland
We study linear vibrations of ions confined by a trap with a time-dependent potential strength. This system behaves similarly to quantum fields in an expanding or contracting universe, where changes in the metric/curvature produce entangled particles of opposite momenta. For the ions we interpret the strength of the trapping potential as "curvature" and describe the creation of squeezed and entangled phonon-states.