Gauge Fields, Mode Mixing and Local Density of States in a Quantum Point Contact
| dc.creator | Ulreich, S. | |
| dc.creator | Zwerger, W. | |
| dc.date | 1997-10-17 | |
| dc.date.accessioned | 2026-07-07T03:09:16Z | |
| dc.date.available | 2026-07-07T03:09:16Z | |
| dc.description | It is shown that the elimination of the discrete transverse motion in a waveguide of arbitrary shape may be described in terms of a non-abelian gauge field for the longitudinal dynamics. This allows for an exact treatment of the scattering between different modes by eliminating the gauge field at the expense of a non-diagonal matrix of local subband energies. The method is applied to calculate the local density of states (LDOS) in a quantum point contact. Contrary to the total conductance which is well described by an adiabatic approximation, mode mixing turns out to play a crucial role for local properties like the LDOS. | |
| dc.description | 6 pages, 2 postscript figures, submitted to Europhysics Letters, LaTeX (with EuroMacr.tex, EuroPhys.sty) | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9710174 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9710174 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27819 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Gauge Fields, Mode Mixing and Local Density of States in a Quantum Point Contact | |
| dc.type | text |