Cold Atom Qubits
Quantum Gases
2012-03-20 v2 Quantum Physics
Abstract
We discuss a laser-trapped cold-atom superfluid qubit system. Each qubit is proposed as a macroscopic two-state system based on a set of Bose-Einstein condensate (BEC) currents circulating in a ring, cut with a Josephson barrier. We review the effective low energy description of a single BEC ring. In particular, it is demonstrated that such system has a set of metastable current states which, for certain range of parameters, form an effective two-state system, or a qubit. We show how this qubit can be initialized and manipulated with currently available laser-trapping techniques. We also discuss mechanisms of coupling several such ring qubits as well as measuring individual qubit-ring systems.
Cite
@article{arxiv.1005.5487,
title = {Cold Atom Qubits},
author = {Dmitry Solenov and Dmitry Mozyrsky},
journal= {arXiv preprint arXiv:1005.5487},
year = {2012}
}