We employ the Keldysh formalism in the quasiclassical approximation to study transport in a diffusive superconductor. The resulting 434 transport equations describe the flow of charge and energy as well as the corresponding flow of spin and spin energy. Spin-flip scattering due to magnetic impurities is included. We find that the spin-flip length is renormalized in the superconducting case and ...

We demonstrate theoretically that most of the observed transport properties of graphene sheets at zero magnetic field can be explained by scattering from charged impurities. We find that, contrary to common perception, these properties are not universal but depend on the concentration of charged impurities n(imp). For dirty samples (250 x 10(10) cm(-2) < n(imp) < 400 x 10(10) cm(-2)), the value...

The key role that entanglement plays in quantum information processing has been investigated over the past few years [1]. In this framework, the role that it plays in quantum transport in mesoscopic systems has been analyzed [2]. Recently, we have shown a novel way in which entanglement can be used for controlling electron transport in nanostructures [3]. Assume that we have a 1D wire, where tw...

We re-examine the quantum q and transport t scattering lifetimes due to background impurities in twodimensional systems. We show that the well-known logarithmic divergence in the quantum lifetime is due to the nonphysical assumption of an infinitely thick heterostructure and demonstrate that the existing nondivergent multiple scattering theory can lead to unphysical quantum scattering lifetimes...

We show that the electron transmittivity of single electrons propagating along a one-dimensional (1D) wire in the presence of two magnetic impurities is affected by the entanglement between the impurity spins. For suitable values of the electron wave vector, there are two maximally entangled spin states which, respectively, make the wire completely transparent whatever the electron spin state o...

We study the breaking of integrability by a finite density dilute impurities, specifically emerging diffusive transport. Provided distance between impurities (localized perturbations) is large, one would expect scattering rates to be additive, and therefore, resistivity proportional number (the so-called Matthiessen's rule). show that this is, in general, not case. If transport anomalous origin...