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APS » Journals » Phys. Rev. Lett. » Volume 93 » Issue 14
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Phys. Rev. Lett. 93, 140408 (2004) [4 pages]

Single Atom Transistor in a 1D Optical Lattice

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A. Micheli1,2, A. J. Daley1,2, D. Jaksch3, and P. Zoller1,2
1Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
2Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria
3Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

Received 3 June 2004; published 1 October 2004

We propose a scheme utilizing a quantum interference phenomenon to switch the transport of atoms in a 1D optical lattice through a site containing an impurity atom. The impurity represents a qubit which in one spin state is transparent to the probe atoms, but in the other acts as a single atom mirror. This allows a single-shot quantum nondemolition measurement of the qubit spin.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.140408
DOI:
10.1103/PhysRevLett.93.140408
PACS:
03.75.Lm, 03.67.Lx, 42.50.–p
 
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