Speaker
Prof.
Christian Schönenberger
(University of Basel)
Description
High-impedance devices, such as quantum devices, are difficult to measure fast, due to the large impedance mismatch between the quantum device and 50 Ohm wave impedance of RF circuits. Fast and reliable read-out requires impedance matching, which is achieved through a resonant circuit. We compare two approaches, a) a lumped LC- and b) transmission line resonator on a quantum dot (QD) of which we measure its shot noise. We have tested the two approaches on QDs defined in a single carbon nanotube. We typically find suppressed shot-noise as expected for and in agreement with sequential tunneling through a QD. However, we also find regions of enhanced shot noise within and outside of Coulomb-blockade (CB). We explain this by blocking states.
Authors
Prof.
Christian Schönenberger
(University of Basel)
Dr
Thomas Hasler
(University of Basel)
Dr
Gabriel Puebla-Hellmann
(University of Basel)
Dr
Vishal Ranjan
(University of Basel)
Dr
Cezar Harabula
(University of Basel)
Mr
Roy Haller
(University of Basel)
Dr
Minkyung Jung
(University of Basel)
Dr
Gergö Fülöp
(University of Basel)
