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Phys. Rev. A 78, 010101(R) (2008) [4 pages]

Mesoscopic spin-boson models of trapped ions

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D. Porras1, F. Marquardt2, J. von Delft2, and J. I. Cirac1
1Max-Planck Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, Garching D-85748, Germany
2Physics Department, Arnold Sommerfeld Center for Theoretical Physics, and Center for NanoScience, Ludwig-Maximilians-Universität München, 80333 München, Germany

Received 29 October 2007; revised 29 February 2008; published 2 July 2008

Trapped ions arranged in Coulomb crystals provide us with the elements to study the physics of a single spin coupled to a boson bath. In this work, we show that optical forces allow us to realize a variety of spin-boson models, depending on the crystal geometry and the laser configuration. We study in detail the ohmic case, which can be implemented by illuminating a single ion with a traveling wave. The mesoscopic character of the phonon bath in trapped ions induces effects such as the appearance of quantum revivals in the spin evolution.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.010101
DOI:
10.1103/PhysRevA.78.010101
PACS:
03.65.Yz, 05.30.Jp, 37.10.Vz
 
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