University of Basel

Department
of Physics

Quantum Coherence Lab - Zumbühl Group

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Pierre-Armand

Pierre-Armand joins for an internship

With a bachelor degree in physics from Strasbourg University, Pierre-Armand Barbieri starts his internship in our group on "Nanofabrication and Characterization of core/shell Ge/Si Nanowires" project. Welcome to the group and looking…
Chat

Quantum Industry Chat at Hightech Zentrum Aargau

NCCR SPIN invites industry members and stakeholders to the 2024 Quantum Industry Chat, an event designed to facilitate collaboration and exploration with quantum computing activities. The event unites companies with interest in quantum…
2Q

Nature Physics published: Anisotropic exchange interaction of two hole-spin qubits

First demonstration of a 2Q gate with holes in Silicon! In a fin field-effect transistor, the workhorse device of today’s semiconductor industry. The exchange is anisotropic because of the spin–orbit interaction. Upon tunnelling from one…
QBio

Swissnex Boston: Quantum, a Catalyst for Bio

Quantum, a catalyst for bio, took place on Monday March 11, 2024 in Boston. Hosted at The Engine at MIT, Cambridge, MA, organized by Swissnex in partnership with NCCR SPIN explored how quantum can catalyze advances in the life sciences. …
awards

APS Awards for Miguel, Jonas and Dominik

Miguel Carballido (Basel) and Jonas Schuff (Oxford) win the APS Distinguished Student Award for outstanding non-US young researchers. Congratulations to both for the great work and talks! Dominik Zumbühl was named an APS fellow  "For…
APS

APS March Meeting 2024 Minneapolis

AI for Quantum Devices Mon B18.01  Autonomous Tuning of Semiconductor-based Qubits Jonas Schuff (Oxford) Tue G12.11 Beating-free quantum oscillations with strong spin-orbit and Zeeman interactions, Dominik Zumbühl Ge/Si nanowire hole spin…
isoZ

On arXiv: A Qubit with Simultaneously Maximized Speed and Coherence

To overcome the threshold for fault-tolerant quantum computation, qubits have to be protected from their noisy environment to attain the necessary high fidelities. Recent experiments discovered sweet spots with strongly enhanced coherence.…
Autonomous

On arXiv: Fully autonomous tuning of a spin qubit

Identifying optimal operating conditions for semiconductor qubits is a highly complex process, involving the exploration of a vast parameter space. This presents a real ‘needle in the haystack’ problem, which, until now, has resisted…
Erwin

Erwin Renzo Franco Diaz joins as Master Student

With a bachelor degree in physics from Universidad Nacional Mayor de San Marcos, Erwin Renzo Franco Diaz starts his master of science project in our group on the theory of "hole spin-qubits in SiGe nanowires". Welcome to the group and…
Bridging

Published in PRX: Bridging the Reality Gap in Quantum Devices with Machine Learning

The discrepancies between reality and simulation impede the optimization and scalability of solid-state quantum devices. Disorder induced by the unpredictable distribution of material defects is one of the major contributions to the reality…
SdH

Published in PRR: Beating-free quantum oscillations in 2D gases with strong spin-orbit and Zeeman interactions

Shubnikov-de Haas (SdH) oscillations are the fingerprint of the Landau and Zeeman splitting level structure on the 2D resistivity, serving as a paradigmatic experimental probe. So far, no analytical description could be found for the vast…

Group Dinner 2023

Our group dinner with a round of speeches from new and seasoned members as well as a number of group guests, accompanied by a set of dishes and drinks. Time to relax and let the very busy year pass in review! Thanks very much to everyone,…
Yiqi

Yiqi Zhao joins as a Master student

With a bachelor degree in physics from ETH Zurich, Yiqi Zhao starts her master of science project in our group on "RF quantum circulators". Welcome to the group and looking forward to working with you...
STO

Published in PRAppl: Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots

Radio frequency reflectometry for qubit readout enables high bandwidth but requires careful impedance matching which is challenging to do in-situ at mK temperatures due to freeze-out of GaAs varactors. In this manuscript, we present a…
Armel

Armel Cotten joins as a PhD student

With a joint MSc degree from Grenoble INP Phelma, Polytechnic of Turin, and EPFL in nanotechnology, Armel Cotten is starting his PhD project in the microkelvin team, Welcome to the group, and looking forward to work with you!
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