Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 6: Ultracold atoms, ions and BEC I (with A)
Q 6.8: Talk
Monday, March 17, 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.