376 citations · 712 across the 10 of their papers we have counts for
8 papers · 1 filter
A quantum criticality perspective on the charging of narrow quantum-dot levels
V. Kashcheyevs, C. Karrasch, T. Hecht +3
Understanding the charging of exceptionally narrow levels in quantum dots in the presence of interactions remains a challenge within mesoscopic physics. We address this fundamental…
Realistic modelling of quantum point contacts subject to high magnetic fields and with current bias at out of linear response regime
S. Arslan, E. Cicek, D. Eksi +3
The electron and current density distributions in the close proximity of quantum point contacts (QPCs) are investigated. A three dimensional Poisson equation is solved self-consist…
Phase lapses in transmission through interacting two-level quantum dots
C. Karrasch, T. Hecht, A. Weichselbaum +3
We investigate the appearance of pi lapses in the transmission phase theta of a two-level quantum dot with Coulomb interaction U. Using the numerical and functional renormalization…
Mesoscopic to universal crossover of transmission phase of multi-level quantum dots
C. Karrasch, T. Hecht, A. Weichselbaum +3
Transmission phase αmeasurements of many-electron quantum dots (small mean level spacing δ) revealed universal phase lapses by πbetween consecutive resonances. In contrast, for dot…
Tunability of qubit Coulomb interaction: Numerical analysis of top gate depletion in two-dimensional electron systems
A. Weichselbaum, S. E. Ulloa
We investigate the tunability of electrostatic coupling between solid state quantum dots as building blocks for quantum bits. Specifically, our analysis is based upon two-dimension…
Spatially resolved manipulation of single electrons in quantum dots using a scanned probe
A. Pioda, S. Kicin, T. Ihn +7
The scanning metallic tip of a scanning force microscope was coupled capacitively to electrons confined in a lithographically defined gate-tunable quantum dot at a temperature of 3…