Admittance of planar two-terminal quantum systems
| dc.creator | Wulf, U. | |
| dc.creator | Racec, P. N. | |
| dc.creator | Racec, E. R. | |
| dc.date | 2006-06-26 | |
| dc.date.accessioned | 2026-07-07T07:46:29Z | |
| dc.date.available | 2026-07-07T07:46:29Z | |
| dc.description | We develop an approach to calculate the admittance of effectively one-dimensional open quantum systems in random phase approximation. The stationary, unperturbed system is described within the Landauer-Büttiker formalism taking into account the Coulomb interaction in the Hartree approximation. The dynamic changes in the effective potential are calculated microscopically from the charge-charge correlation function resulting from the stationary scattering states. We provide explicit RPA-expressions for the quantum admittance. As a first example the case of a quantum capacitor is considered where we can derive a small-frequency expansion for the admittance which lends itself to an experimental testing of the theory. A comparison of the low-frequency expansion with the complete RPA-expression shows that for a quantum capacitor a simple classical equivalent circuit with frequency-independent elements does not describe satisfactorily the quantum-admittance with increasing the frequency. | |
| dc.description | 13 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0606673 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0606673 | |
| dc.identifier | Phys. Rev. B 75, 075320 (2007) (9 pages) | |
| dc.identifier | doi:10.1103/PhysRevB.75.075320 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/123846 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Admittance of planar two-terminal quantum systems | |
| dc.type | text |