Issue
EPL
Volume 87, Number 6, September 2009
Article Number 67003
Number of page(s) 3
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/87/67003
Published online 06 October 2009
EPL, 87 (2009) 67003
DOI: 10.1209/0295-5075/87/67003

Quantum capacitor with discrete charge-anticharge: Spectrum and forces

J. C. Flores

Instituto de Alta Investigación IAI, Universidad de Tarapacá - Casilla 7-D, Arica, Chile

cflores@uta.cl

received 8 May 2009; accepted in final form 9 September 2009; published September 2009
published online 6 October 2009

Abstract
The quantum capacitor with discrete charge is modeled by a Hamiltonian containing an inductive intrinsic term (tunnel effect between plates). The spectrum is obtained using a double Hilbert space. Fluctuations in the charge-anticharge pairs (zero total charge) give rise to an elementary attraction which is compared to the Casimir force. In this case, the field-fluctuations force could be also interpreted as charge-fluctuations force.

PACS
73.23.-b - Electronic transport in mesoscopic systems.
73.63.-b - Electronic transport in nanoscale materials and structures.
73.21.-b - Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems.

© EPLA 2009