title: Single atom transistor in a 1D optical lattice.
abstract: 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.
authors.affiliation: Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria.
authors.forename: A
authors.initials: A
authors.lastname: Micheli
authors.forename: A J
authors.initials: AJ
authors.lastname: Daley
authors.forename: D
authors.initials: D
authors.lastname: Jaksch
authors.forename: P
authors.initials: P
authors.lastname: Zoller