A Single Atom Mirror for 1D Atomic Lattice Gases
Mesoscale and Nanoscale Physics
2009-11-11 v1
Abstract
We propose a scheme utilizing quantum interference to control the transport of atoms in a 1D optical lattice by a single impurity atom. The two internal state of the impurity represent a spin-1/2 (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 to ``amplify'' the state of the qubit, and provides a single-shot quantum non-demolition 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 a gas of many interacting bosonic of fermionic atoms.
Cite
@article{arxiv.cond-mat/0506498,
title = {A Single Atom Mirror for 1D Atomic Lattice Gases},
author = {A. Micheli and P. Zoller},
journal= {arXiv preprint arXiv:cond-mat/0506498},
year = {2009}
}
Comments
20 pages, 15 figures