Physics – Condensed Matter
Scientific paper
1998-12-20
Eur. Phys. J. B 9, 215-223 (1999).
Physics
Condensed Matter
Scientific paper
Ground state of the two-dimensional hard-core-boson system in the presence of the quenched random chemical potential is investigated by means of the exact-diagonalization method for the system sizes up to L=5. The criticality and the DC conductivity at the superfluid-localization transition have been controversial so far. We estimate, with the finite-size scaling analysis, the correlation-length and the dynamical critical exponents as nu=2.3(0.6) and z=2, respectively. The AC conductivity is computed with the Gagliano-Balseiro formula, with which the resolvent (dynamical response function) is expressed in terms of the continued-fraction form consisted of Lanczos tri-diagonal elements. Thereby, we estimate the universal DC conductivity as sigma_c(omega=0)=0.135(0.01) ((2e)^2/h).
No associations
LandOfFree
Numerical diagonalization analysis of the ground-state superfluid-localization transition in two dimensions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Numerical diagonalization analysis of the ground-state superfluid-localization transition in two dimensions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical diagonalization analysis of the ground-state superfluid-localization transition in two dimensions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-262128