2 research outputs found

    Impurity in a Luttinger liquid away from half-filling: a numerical study

    Full text link
    Conformal field theory gives quite detailed predictions for the low energy spectrum and scaling exponents of a massless Luttinger liquid at generic filling in the presence of an impurity. While these predictions were verified for half-filled systems, there was till now no analysis away from this particular filling. Here, we fill in this gap by numerically investigating a quarter-filled system using the density matrix renormalization group technique. Our results confirm conformal field theory predictions, and suggest that they are indeed valid for arbitrary fillings.Comment: 9 pages (include figures), one reference added in this new versio

    Conformal field theory approach to gapless 1D fermion systems and application to the edge excitations of ν=1/(2p+1)\nu =1/(2p+1) quantum Hall sequences

    No full text
    corecore