A path integral study of the role of correlation in exchange coupling of spins in double quantum dots and optical lattices

Jesper Goor Pedersen, Lei Zhang, M.J. Gilbert, J. Shumway

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We explore exchange coupling of a pair of spins in a double dot and in an optical lattice, using the frequency of exchanges in a bosonic path integral, evaluated using Monte Carlo simulation. The algorithm gives insights into the role of correlation through visualization of two-particle probability densities, instantons, and the correlation hole. We map the problem to the Hubbard model and see that exchange and correlation renormalize the model parameters, dramatically reducing the effective on-site repulsion at larger separations
    Original languageEnglish
    JournalJournal of Physics Condensed Matter
    Volume22
    Issue number14
    Pages (from-to)145301
    ISSN0953-8984
    DOIs
    Publication statusPublished - 2010

    Fingerprint

    Dive into the research topics of 'A path integral study of the role of correlation in exchange coupling of spins in double quantum dots and optical lattices'. Together they form a unique fingerprint.

    Cite this