News

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 her 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 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!
Phase

Published in PRL: Phase driving of hole spin qubits

The spin-orbit interaction in spin qubits enables Rabi oscillations when an external microwave field is resonant with the qubit frequency. In this work, we introduce an alternative driving mechanism of hole spin qubits, where a far-detuned…
SiQEW Kyoto

Silicon Quantum Electronics Workshop Kyoto

The Silicon Quantum Electronics Workshop is a series of workshops focusing on silicon-based approaches to quantum electronics and is an all-contributed talks conference with mostly young researchers presenting. The 2023 edition (SiQEW 2023)…
dmz

Dominik elected fellow of the American Physical Society 2023

The American Physical Society (APS) Fellowship Program recognizes outstanding individuals in the physics community who have contributed to advances in physics through original research, innovative applications, teaching, and leadership.…
swissnex

Swissnex Quantum Summit at EPFL

Bringing together key ecosystem builders from several countries to discuss how to jointly accelerate breakthroughs and shape the quantum economy. On the verge of new technological breakthroughs, governments, universities, and companies…
hike

Group Hike 2023 Aletsch Gletscher

After having to chancel the hike in 2022 due to bad weather, we wanted to go out into the mountains in 2023. With the cable car up to Jungfraujoch and down over the Jungfraufirn to Konkordiaplatz and a bit back up to Concordia SAC Hütte…
NZZ

NZZ Format on quantum computing on SRF

NZZ Format documentary on quantum computing was on the air last week on Swiss TV, with the University of Basel team, uptown Basel, ETHZ colleagues, a startup and many more. The docu-short, produced by Julia Schwamborn, presents the…