activity
20092015
most citedObservation of the Kibble-Zurek scaling law for defect formation in ion crystals

283 citations · 449 across the 6 of their papers we have counts for

collaborators

6 papers

physics.atom-ph2015★ 58 cited

Microscopy with a Deterministic Single Ion Source

Georg Jacob, Karin Groot-Berning, Sebastian Wolf +6

We realize a single particle microscope by using deterministically extracted laser cooled Ca ions from a Paul trap as probe particles for transmission imaging. We demons…

physics.atom-ph2014★ 2 cited

Single particle microscopy with nanometer resolution

Georg Jacob, Karin Groot-Berning, Sebastian Wolf +5

We experimentally demonstrate nanoscopic transmission microscopy relying on a deterministic single particle source. This increases the signal-to-noise ratio with respect to convent…

quant-ph2013★ 283 cited

Observation of the Kibble-Zurek scaling law for defect formation in ion crystals

S. Ulm, J. Roßnagel, G. Jacob +8

Traversal of a symmetry-breaking phase transition at a finite rate can lead to causallyseparated regions with incompatible symmetries and the formation of defects at their boundari…

quant-ph2012★ 59 cited

Precise Experimental Investigation of Eigenmodes in a Planar Ion Crystal

H. Kaufmann, S. Ulm, G. Jacob +5

The accurate characterization of eigenmodes and eigenfrequencies of two-dimensional ion crystals provides the foundation for the use of such structures for quantum simulation purpo…

quant-ph2012★ 36 cited

Quantum Magnetism of Spin-Ladder Compounds with Trapped-Ion Crystals

A. Bermudez, J. Almeida, K. Ott +6

The quest for experimental platforms that allow for the exploration, and even control, of the interplay of low dimensionality and frustration is a fundamental challenge in several…

quant-ph2009★ 11 cited

Feedback-Optimized Operations with Linear Ion Crystals

J. F. Eble, S. Ulm, P. Zahariev +2

We report on transport operations with linear crystals of 40Ca+ ions by applying complex electric time-dependent potentials. For their control we use the information obtained from…