University of Basel

Department
of Physics

Quantum Coherence Lab - Zumbühl Group

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PhD defense of Omid Sharifi Sedeh

Defense
dispersivePSB

On arXiv: A direct dispersive signature of Pauli spin blockade

One of the key signatures of quantum mechanics is the Pauli principle, ensuring proper symmetry of the wavefunction under exchange of the particles. For fermions such as electrons or holes in semiconductor nanostructures, this is embodied…
Engadina

Annual meeting NCCR SPIN

The fifth Annual Meeting of NCCR SPIN took place in June 2025 in Pontresina. The meeting included more than 30 scientific talks and pitches, plus more than 35 posters, an innovation talk and fireside chat by and with Tristan Meunier, CTO…
Rafael

PhD defense of Rafael Eggli

Rafael Eggli successfully defended his PhD theses today, Friday 13th of June. "Gate reflectometry with hole spins", with Prof. Saulius Vaitikienas (Copenhagen) as external referee, Prof. Richard Warburton as second advisor, and Prof. Daniel…
Andrea Chieppa

Andrea Chieppa joining as a PhD student

With a MSc degree from University of Pisa, Andrea is starting his PhD project within WSS Research Center for Molecular Quantum Systems (molQ).
MetaLearning

On arXiv: Meta-learning characteristics and dynamics of quantum systems

Machine learning holds great promise for quantum technologies, with most current methods focusing on predicting or controlling a specific quantum system. Meta-learning approaches, however, can adapt to new systems for which little data is…
APS2025

APS Global Summit 2025, Anaheim

Mon A19 Germanium Hole-Spin Qubits, 8:00 am, 163 (Level 1) A19 10:36 am All-electrical operation of a spin qubit coupled to a high-Q resonator, Rafael Eggli Tue J19 Cryogenic Control of Spin Qubits, 3:00 pm, 163 (Level1) J19 3:00 pm…
5LG in B-field

On arXiv: Signatures of Chiral Superconductivity in Rhombohedral Graphene

Chiral superconductors are unconventional superconducting states that break time reversal symmetry spontaneously and typically feature Cooper pairing at non-zero angular momentum. Such states may host Majorana fermions and provide an…
Karthi

Karthekan Sivasubramaniam joining as a Master Student

With a Bachelor degree from the University of Basel, Karthekan is starting as a master student in our group! He will work on quantum parametric amplifiers.
bias

On arXiv: Finite-Bias Coulomb Blockade Thermometry

Temperature is a key parameter in quantum devices, where different degrees of freedom can decouple and exhibit intricate thermodynamics. Coulomb blockade thermometers (CBTs) are versatile and, in principle, primary thermometers operating…
coupling

Published in Phys. Rev. Research: Coupling a high-Q resonator to a spin qubit with all-electrical control

High-Q resonators make possible fast spin readout but are susceptible to crosstalk and suffer from ringup due to qubit control pulses. Here, we report on the coherent and all-electrical control of a Si:FinFET hole spin qubit at 1.5 K with a…
pcsi

Conference on the Physics and Chemistry of Surfaces and Interfaces of the AVS

The 50th conference on the Physics and Chemistry of Surfaces and Interfaces, organized by the American Vacuum Society (AVS), took place in Kona-Kailua on the beautiful big island of Hawai. Co-chaired by Chris Palmstrom (UCSB) and Paul…
LLfig

On ArXiv: Giant end-tunneling effect in two distinct Luttinger liquids coexisting in one quantum wire

We combine tunneling spectroscopy with density-dependent transport measurements in the same quantum wires over more than two orders of magnitude in temperature to very low temperatures down to ∼40 mK. This reveals that, when the second 1D…
Ilya G.

/ Research, People

Ilya Golokolenov joining as a Postdoctoral researcher

With a Ph.D degree from the Université Grenoble Alpes, and M.Sc. degree from Moscow Institute of Physics and Technology, Ilya is starting as a postdoctoral researcher in our group!
dinner

Group Dinner 2024

Our group dinner was a great evening of rhetoric and culinary delight! Franco also surprised us not only with a speech but also with a great saxophone performance with all-time classics from Napoli (and Italy at large)! As usual, we made…
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