p.1 * sketch of a heterostr. - en.wikipedia.org/wiki/Two-dimensional_electron_gas * 10.1093/nsr/nwu071 & arxiv.org/abs/1501.00073 p.2 * both figures - Vurgaftman et al. '01: doi: 10.1063/1.1368156 p.3 * the less known QPC - J. Phys. C: Sol. St. Phys. 21, L209 (1988) p.4 * the better known QPC (bottom) - PRL 60, 848 p.5 * all figures - Frank et al. '98: doi: 10.1126/science.280.5370.1744 p.6 * all figures - Nature 411, 51 (2001) p.7 * thermopower - van Houten et al. '92: doi: p.8 * top panels - Celso de Mello Donega '11: doi: 10.1039/C0CS00055H p.9 * all figures - Phys. Rev. B 61, 16773 (2000) p.10 * left - see p.9 * right - Stampfer et al. '08: doi: 10.1063/1.2827188 p.11,13 * Kondo in QD - Cronenwett et al. '98: doi: 10.1126/science.281.5376.540 p.12 * p. 382 G. Mahan: Many-particle physics