arXiv subjects

M. G. A. Crawford

Publications and source records attributed to M. G. A. Crawford.

2 recordsLinked to original sources

arXiv2003

Crossover from weak localization to weak antilocalization in a disordered microbridge

We calculate the weak localization correction in the double crossover to broken time-reversal and spin-rotational symmetry for a disordered microbridge or a short disordered wire using a scattering-matrix approach. Whereas the correction has universal limiting values in the three basic symmetry classes, the functional form of the magnetoconductance is affected by eventual non-homogeneities in the microbridge.

cond-mat.mes-hall↗

arXiv2001

Density of proper delay times in chaotic and integrable quantum billiards

We calculate the density P(τ) of the eigenvalues of the Wigner-Smith time delay matrix for two-dimensional rectangular and circular billiards with one opening. For long times, the density of these so-called "proper delay times" decays algebraically, in contradistinction to chaotic quantum billiards for which P(τ) exhibits a long-time cut-off.

cond-mat.mes-hall↗