6 papers
Investigating the origin of time with trapped ions
Serge Massar, Philippe Spindel, Andrés F. Varón +1
Even though quantum systems in energy eigenstates do not evolve in time, they can exhibit correlations between internal degrees of freedom in such a way that one of the internal de…
A trapped-ion based quantum byte with next-neighbour cross-talk
Ch. Piltz, Th. Sriarunothai, A. F. Varón +1
The addressing of a particular qubit within a quantum register is a key prerequisite for scalable quantum computing. In general, executing a quantum gate with a single qubit, or a…
Protecting conditional quantum gates by robust dynamical decoupling
Ch. Piltz, B. Scharfenberger, A. Khromova +2
Dephasing -- phase randomization of a quantum superposition state -- is a major obstacle for the realization of high fidelity quantum logic operations. Here, we implement a two-qub…
Designer Spin Pseudomolecule Implemented with Trapped Ions in a Magnetic Gradient
A. Khromova, Ch. Piltz, B. Scharfenberger +4
We report on the experimental investigation of an individual pseudomolecule using trapped ions with adjustable magnetically induced J-type coupling between spin states. Resonances…
Quantum Gates and Memory using Microwave Dressed States
N. Timoney, I. Baumgart, M. Johanning +4
Trapped atomic ions have been successfully used for demonstrating basic elements of universal quantum information processing (QIP). Nevertheless, scaling up of these methods and te…
Quantum Simulations with Cold Trapped Ions
Michael Johanning, Andres Varon, Christof Wunderlich
The control of internal and motional quantum degrees of freedom of laser cooled trapped ions has been subject to intense theoretical and experimental research for about three decad…