Coherent control of atomic transport in spinor optical lattices

Brian Mischuck, Ivan H. Deutsch, Poul S. Jessen

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Coherent transport of atoms trapped in an optical lattice can be controlled by microwave-induced spin flips that correlate with site-to-site hopping. We study the controllability of homogeneous one-dimensional systems of noninteracting atoms in the absence of site addressability. Given these restrictions, we construct a deterministic protocol to map an initially localized Wannier state to a wave packet that is coherently distributed over n sites. As an example, we consider a one dimensional quantum walk in the presence of both realistic photon scattering and inhomogeneous broadening of the microwave transition due to the optical lattice. Using composite pulses to suppress errors, fidelities of over 95% can be achieved for a 25-step walk. We extend the protocol for state preparation to analytic solutions for arbitrary unitary maps given homogeneous systems and in the presence of time-dependent uniform forces. Such control is important for applications in quantum information processing, such as quantum computing and quantum simulations of condensed matter phenomena.

Original languageEnglish (US)
Article number023403
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume81
Issue number2
DOIs
StatePublished - Feb 4 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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