Single-atom mirror for one-dimensional atomic lattice gases

A. Micheli and P. Zoller
Phys. Rev. A 73, 043613 – Published 20 April 2006

Abstract

We propose a scheme utilizing quantum interference to control the transport of atoms in a one-dimensional optical lattice by a single impurity atom. The two internal state of the impurity represent a spin-12 (qubit), which in one spin state is perfectly transparent to the lattice gas, and in the other spin state acts as a single atom mirror, confining the lattice gas. This allows one to “amplify” the state of the qubit, and provides a single-shot quantum nondemolition measurement of the state of the qubit. We derive exact analytical expression for the scattering of a single atom by the impurity, and give approximate expressions for the dynamics of a gas of many interacting bosonic or fermionic atoms.

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  • Received 20 June 2005

DOI:https://doi.org/10.1103/PhysRevA.73.043613

©2006 American Physical Society

Authors & Affiliations

A. Micheli and P. Zoller

  • Institute for Theoretical Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria

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Issue

Vol. 73, Iss. 4 — April 2006

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