We use the Ehrenfest urn model to illustrate the subtleties of error estimation in Monte Carlo simulations. We discuss how the smooth results of correlated sampling in Markov chains can fool oneâ€™sâ€¦ (More)

We propose a random matrix theory to describe the influence of a time-dependent external field on electron transport through open quantum dots. We describe the generation of the current by anâ€¦ (More)

Certain zero-bias anomalies (ZBAs) in the voltage, temperature and magnetic field dependence of the conductance G(V, T,H) of quenched Cu point contacts have previously been interpreted to be due toâ€¦ (More)

Random-matrix theory is used to study the mesoscopic fluctuations of the excitation gap in a metal grain or quantum dot induced by the proximity to a superconductor. We propose that the probabilityâ€¦ (More)

The coupled phonon â€”surface-wave modes of a two-dimensional Wigner crystal resting on the surface of a liquid are studied. It is shown that, in experimentally accessible situations, the threshold forâ€¦ (More)

The time development of the reduced density matrix for a quantum oscillator damped by coupling it to an ohmic environment is calculated via an identity of the Debye-Waller form. Results obtained someâ€¦ (More)

We discuss the influence of the electromagnetic environment and the electronâ€“electron interaction on the weak localization correction to the conductivity of a disordered metal. The theory of thisâ€¦ (More)

A normal metal in the proximity of a superconductor acquires characteristics that are typical of the superconducting state [1]. One of those characteristics is that the quasiparticle density ofâ€¦ (More)

We have studied the phase-slip process by which charge-density-wave (CDW) current is converted to single-particle current at electrical contacts. Transport and X-ray scattering measurements indicateâ€¦ (More)