Conductance of Quantum Impurity Models from Quantum Monte Carlo

Details Conductance of Quantum Impurity Models from Quantum Monte Carlo Conductance of Quantum Impurity Models from Quantum Monte Carlo

2010-07-29

arxiv.org/abs/1007.5280v1

Phys. Rev. B 82, 165447 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 7 figures

Scientific paper

10.1103/PhysRevB.82.165447

The conductance of two Anderson impurity models, one with two-fold and another with four-fold degeneracy, representing two types of quantum dots, is calculated using a world-line quantum Monte Carlo (QMC) method. Extrapolation of the imaginary time QMC data to zero frequency yields the linear conductance, which is then compared to numerical renormalization group results in order to assess its accuracy. We find that the method gives excellent results at low temperature (T

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