Phys. Rev. A 72, 062108 (2005) [6 pages]Efficient scheme for multipartite entanglement and quantum information processing with trapped ionsReceived 14 August 2005; published 7 December 2005 In this paper, based on the recent experiment by Roos et al. Science 304 1478 (2004), a theoretical scheme is proposed to create the multipartite entanglement of many trapped ions and implement a two-qubit quantum phase gate between two ions in ion trap. In the scheme, the ion is illuminated by a single laser tuned to the first lower vibrational sideband. We also show that the scheme can be used to directly transfer information between two ions. The scheme has the advantage that it does not use the vibrational mode as the data bus and only requires a single resonant interaction. Thus the scheme is very simple and the quantum dynamics operation can be realized at a high speed. In view of the decoherence mechanism, the simplification for the entangled state preparation and experimental implementation of quantum logic operation may become crucial. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.062108
DOI:
10.1103/PhysRevA.72.062108
PACS:
03.67.Mn, 03.65.Ud, 42.50.Vk, 03.67.Lx
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