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-P\'erot 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.Comment: 10 pages, 4 embedded figure

A posteriori error analysis and global error control for adaptive finite element approximations of hyperbolic problems

Paper presented to the 16. International Conference on Numerical Analysis, Dundee (GB), Jun 1995SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--95/14) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Numerical investigations of boundary layer effects in a shock tube

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--91/2) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Upwinded test functions for finite element and finite volume methods

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--91/11) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Pseudospectra of matrices

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--91/10) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Spurious entropy generation as a mesh quality indicator

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--93/12) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Lower bounds for the spectrum of non-selfadjoint second-order elliptic operators

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG-R--93/2) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Interpolation and differentiation of multivariate functions and interpolation of divergence-free vector fields using surface splines

SIGLEAvailable from British Library Document Supply Centre- DSC:7578.615(OUCL-NAG--91/5) / BLDSC - British Library Document Supply CentreGBUnited Kingdo