University of Basel

Department
of Physics

Quantum Coherence Lab - Zumbühl Group

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Davide Mastrapasqua joins group as electronics technician on a QSIT technology transfer project!

Coming from a laboratory of engineering at the Politecnico di Torino, Davide is starting as an electronics technician on the QSIT technology transfer project "Basel Precision Instruments GmbH -- Low-Noise Electronics for Quantum Science".…
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Prof. Carlos Egues gave a talk on many-body localization

Prof. Carlos Egues, Sao Paulo University, Brazil, is currently visiting the group this week and just gave a special seminar about "Many-body localization in a central spin model". Thanks very much for giving a very interesting talk on a…
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Prof. Catalina Marinescu gave talk on spin-orbit quantum corrections

Prof. Catalina Marinescu, Clemson University, USA, gave a special seminar about "Localization in Spin-Orbit Coupled Electron Systems". Thanks for giving a very nice paedagogical presentation, from the basics of weak-localization physics to…
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QUSTEC call for PhD students

Call open for 39 doctoral fellowships on Quantum Science and Technologies on EUCOR -- The European Campus through MSCA COFUND H2020 Trinational Doctoral Program. Apply now, call closes Aug 19, 2019. More information…
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Published in Carbon: "Characterization of hydrogen plasma defined graphene edges"

Our international team characterizes the quality of remote hydrogen plasma defined graphene edges by Raman spectroscopy, atomic resolution AFM and low temperature electronic transport measurements. For graphene on hBN, the edge is ~40%…
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Published in Phys. Rev. Letters: "Spectroscopy of Quantum-Dot Orbitals with In-Plane B-Fields"

Riken-UCSB-Basel collaboration extracts full 3D-confinement parameters and in-plane orientation of the single-electron quantum orbitals of a GaAs gate-defined dot with sub-nm precision. This is a versatile tool for quantum dots with one…
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"Closed-Form Weak Localization..." published in Phys. Rev. Letters!

This is theoretical work lead by Catalina Marinescu, Clemson University, and J. Carlos Egues, Sao Paulo University, with experiments by Pirmin Weigele and Dominik Zumbühl, University of Basel. We have derived a closed-form expression for…
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Basel Physics Colloquium by Prof. Seigo Tarucha

Today, Prof. Seigo Tarucha from the RIKEN lab and the Unviersity of Tokyo, Japan, is giving the Basel Physics Colloquium with the title "Physics and Technology of Spin-based Quantum Computing with Quantum Dots". From dots in GaAs to Si,…
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PhD Defense of Leon Camenzind

Leon Camenzind successfully defended his PhD thesis "Spins and Orbits in Semiconductor Quantum Dots" today, getting a summa cum laude, with Prof. Seigo Tarucha, RIKEN and University of Tokyo, Japan, as coreferee and Prof. Daniel Loss as…
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New on arXiv: Characterization of Hydrogen Plasma Defined Graphene Edges

We investigate the quality of remote hydrogen plasma defined graphene edges by Raman spectroscopy, atomic resolution AFM and low temperature electronic transport measurements. While on graphite substrate, the edges seem to be nearly perfect…
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Group's spin-off Basel Precision Instruments GmbH at APS Boston exhibit!

First major exhibition where https://baspi.ch was putting it's instruments on display. Laboratory electronics: low noise. high resolution. ultimate stability. Swiss precision. Low-noise 24 bit DAC, low-noise high-stability current and…
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APS March meeting in Boston with 6 talks and 1 poster from the group

This years March meeting featured talks by Leon Camenzind (QD orbitals B-spectroscopy), Kris Cerveny (Tempated InAs Nanowires), Taras Patlatiuk (Edge state wave functions), Christian Scheller (NIS subgap states), Dominik Zumbuhl…
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PhD Defense of Taras Patlatiuk

Taras Patlatiuk successfully defended his PhD thesis "Tunneling Spectroscopy of the Quantum Hall edge states using GaAs Quantum Wires" today with summa cum laude, with Prof. Hadar Steinberg, University of Jerusalem, as coreferee , Prof.…
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Two PRBs published on orbital and g-factor effects!

Our Tokyo RIKEN - Basel collaboration has published two papers in Phys. Rev. B. on the orbital and g-factor effects of a strong in-plane magnetic field on gate-defined quantum dots. Phys. Rev. B 99, 085308 (Feb 22, 2019)Phys. Rev. B…
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Interview by Radio SRF2, Wissenschaftsmagazin

Dominik was interviewed for the "Wissenschaftsmagazin" in radio SRF2 on the topic of the agreement between the EU and Switzerland with regards to the Swiss association to the EU research programs. Saturday, 2.2.2018, 12:35 SRF2Sunday,…
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