J
J. Benhelm
Researcher at Institute for Quantum Optics and Quantum Information
Publications - 2
Citations - 1134
J. Benhelm is an academic researcher from Institute for Quantum Optics and Quantum Information. The author has contributed to research in topics: Ion trap & Quantum entanglement. The author has an hindex of 1, co-authored 2 publications receiving 1055 citations.
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Journal ArticleDOI
Scalable multiparticle entanglement of trapped ions
Hartmut Häffner,W. Hänsel,Christian F. Roos,J. Benhelm,D. Chek-Al-Kar,M. Chwalla,T. Körber,Umakant D. Rapol,M. Riebe,Piet O. Schmidt,Christoph Becher,Otfried Gühne,Wolfgang Dür,Wolfgang Dür,Rainer Blatt +14 more
TL;DR: The scalable and deterministic generation of four-, five-, six-, seven- and eight-particle entangled states of the W type with trapped ions are reported, which obtain the maximum possible information on these states by performing full characterization via state tomography, using individual control and detection of the ions.
Proceedings ArticleDOI
Absolute frequency measurement of 40 Ca + in a Paul trap
M. Chwalla,J. Benhelm,Kihwan Kim,Gerhard Kirchmair,Thomas Monz,M. Riebe,Philipp Schindler,Alessandro S. Villar,Christian F. Roos,W. Haensel,Rainer Blatt,Michel Abgrall,Giorgio Santarelli,G.D. Rovera,Ph. Laurent +14 more
TL;DR: In this article, an absolute frequency measurement of a single 40Ca+ ion in a linear Paul trap at the 10-15 level was performed using a Cs-referenced frequency comb to measure the probe laser exciting the 4s2S1/2 to 3d2D5/2 quadrupole transition at 411 THz.