Two-instanton approximation to the Coulomb blockade problem
Abstract
We develop the two-instanton approximation to the current-voltage characteristic of a single electron transistor within the Ambegaokar-Eckern-Schon model. We determine the temperature and gate voltage dependence of the Coulomb blockade oscillations of the conductance and the effective charge. We find that a small (in comparison with the charging energy) bias voltage leads to significant suppression of the Coulomb blockade oscillations and to appearance of the bias-dependent phase shift.
- Publication:
-
Low Temperature Physics
- Pub Date:
- January 2017
- DOI:
- 10.1063/1.4974188
- arXiv:
- arXiv:1607.04051
- Bibcode:
- 2017LTP....43...95B
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- Low Temp. Phys.43, 95 (2017)