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arXiv:quant-ph/0603217 · Nature

Scalable multiparticle entanglement of trapped ions

Hartmut Häffner, W. Hänsel, Christian F. Roos, Jan Benhelm, D. Chek-al-kar, Michael Chwalla, T. Körber, Umakant D. Rapol, Mark Riebe, Piet O. Schmidt, Christoph Becher, Otfried Gühne, Wolfgang Dür, R. Blatt

Published Nov 30, 2005• 1,252 citations
arXivHTMLPDF
DOI
10.1038/nature04279

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An alternative scheme is proposed for one-step generation of multiparticle cluster state with trapped ions in thermal motion. In this scheme, the ions are simultaneously illuminated by a standing-wave laser tuned to the carrier. During the operations, the vibrational mode is virtually excited, thus the quantum operations are insensitive to the heating. It is shown that the high fidelity multiparticle entanglement could be generated in just one step even including the small fluctuations of parameters. In addition, the ion does not need to be exactly positioned at the node of the standing wave, which is also important from the viewpoint of experiment.