Publications (6)
Dynamics and control of fast ion crystal splitting in segmented Paul traps
H. Kaufmann, T. Ruster, C. T. Schmiegelow +2
We theoretically investigate the process of splitting two-ion crystals in segmented Paul traps, i.e. the structural transition from two ions confined in a common well to ions confi…
Scalable creation of long-lived multipartite entanglement
H. Kaufmann, T. Ruster, C. T. Schmiegelow +6
We demonstrate the deterministic generation of multipartite entanglement based on scalable methods. Four qubits are encoded in Ca, stored in a micro-structured segmented…
Experimental creation and analysis of displaced number states
F. Ziesel, T. Ruster, A. Walther +4
We create displaced number states, which are nonclassical generalizations of coherent states, of a vibrational mode of a single trapped ion.
Measurement of dipole matrix elements with a single trapped ion
M. Hettrich, T. Ruster, H. Kaufmann +4
We demonstrate a new method for the direct measurement of atomic dipole transition matrix elements based on techniques developed for quantum information purposes. The scheme consis…
Entanglement-based dc magnetometry with separated ions
T. Ruster, H. Kaufmann, M. A. Luda +4
We demonstrate sensing of inhomogeneous dc magnetic fields by employing entangled trapped ions, which are shuttled in a segmented Paul trap. As \textit{sensor states}, we use Bell…
Cryogenic setup for trapped ion quantum computing
M. F. Brandl, M. W. van Mourik, L. Postler +15
We report on the design of a cryogenic setup for trapped ion quantum computing containing a segmented surface electrode trap. The heat shield of our cryostat is designed to attenua…