University of Basel

Department
of Physics

Quantum Coherence Lab - Zumbühl Group

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Resonator

On arXiv: All-electrical operation of a spin qubit coupled to a high-Q resonator

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…
BZ

BZ Basel Newspaper Article

Journalist Andreas Schwald and Photographer Kenneth Nars visited the laboratory and produced the article which has appeared in the BZ Basel on Saturday, July 27, 2024, available also pdf (print version) and pdf (online version).
ML

Published: Cross-Architecture Tuning of Si Qubit Devices using Machine Learning

Device-to-device variability and disorder in spin qubits makes it currently necessary to individually tune each device in a large-dimensional gate space to find the optimal conditions for qubit operation. We take a key step with a…
Alt

Published in APL: Prospects of silicide contacts for Si quantum devices

Metal contacts in semiconductor quantum electronic devices can offer advantages over doped contacts, but the formation of a Schottky barrier at the silicon–metal interface can lead to poor contacts at cryogenic temperatures. We investigate…
Giovanni

Giovanni Zhang joins for an internship

With a bachelor degree in physics from Politecnico di Milano, Giovanni Zhang starts his internship in our group on "Cryogenic measurements of quantum devices" project. Welcome to the group and looking forward to working with you!
bla

Annual Meeting NCCR SPIN Year 4

The fourth Annual Meeting of NCCR SPIN took place in June 2024 in Pontresina. The meeting included more than 20 scientific talks and 35 posters, an innovation talk and fireside chat by and with Himadri Majumdar from SemiQon, and a science…
Symposium

Swiss-Japanese Quantum Symposium 2024

A new symposium bringing together key actors in quantum science and technology from Switzerland and Japan. Quantum science and technology hold significant potential for revolutionary breakthroughs. With shared objectives in Science,…
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…
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