title: Efficiency, power, and period at two optimum operations of a thermoelectric single-level quantum dot.
abstract: We take a single-level quantum dot embedded between two metallic leads at different temperatures and chemical potentials which works as a heat engine. Two optimization criteria were used and their corresponding optimized efficiencies, powers, and periods evaluated. A comparison between similar quantities of the two optimization criteria reveals mixed advantages and disadvantages. We quantify the engine's overall performance by suggesting a figure of merit that takes into account the contribution of each of the three quantities. Based on the proposed figure of merit, one of the optimization criterion presents a clear advantage. This same criterion is found to be invariably advantageous when applied to three other representative models.
authors.affiliation: Department of Physics, Addis Ababa University, P. O. Box 1176, Addis Ababa, Ethiopia. fborga9@gmail.com
authors.forename: Fitsum
authors.initials: F
authors.lastname: Borga
authors.forename: Mulugeta
authors.initials: M
authors.lastname: Bekele
authors.forename: Yergou B
authors.initials: YB
authors.lastname: Tatek
authors.forename: Mesfin
authors.initials: M
authors.lastname: Tsige