Single atom transistor in a 1D optical lattice

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 mirro...

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Bibliographic Details
Published in:Physical review letters 2004-10, Vol.93 (14), p.140408.1-140408.4, Article 140408
Main Authors: MICHELI, A, DALEY, A. J, JAKSCH, D, ZOLLER, P
Format: Article
Language:English
Subjects:
Classical and quantum physics: mechanics and fields
Exact sciences and technology
Matter waves
Physics
Quantum information
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.140408