arXiv subjects

A. Renart

Publications and source records attributed to A. Renart.

2 recordsLinked to original sources

arXiv2011

Interference of Fano-Rashba conductance dips

We study the interference of two tunable Rashba regions in a quantum wire with one propagating mode. The transmission dips (Fano-Rashba dips) of the two regions either cross or anti cross depending on the distance between the two regions. For large separations we find Fabry-Pérot oscillations due to the interference of forwards and backwards propagating modes. At small separations overlapping evanescent modes play a prominent role, leading to an enhanced transmission and destroying the conductance dip. Analytical expressions in scattering-matrix theory are given and the relevance of the interference effect in a device is discussed.

cond-mat.mes-hall↗

arXiv2002

Response of Spiking Neurons to Correlated Inputs

The effect of a temporally correlated afferent current on the firing rate of a leaky integrate-and-fire (LIF) neuron is studied. This current is characterized in terms of rates, auto and cross-correlations, and correlation time scale $τ_c$ of excitatory and inhibitory inputs. The output rate $ν_{out}$ is calculated in the Fokker-Planck (FP) formalism in the limit of both small and large $τ_c$ compared to the membrane time constant $τ$ of the neuron. By simulations we check the analytical results, provide an interpolation valid for all $τ_c$ and study the neuron's response to rapid changes in the correlation magnitude.

cond-mat.dis-nn↗