15 Apr 2023

Published in Physical Review Research: Measurement-induced population switching

The act of measurement in quantum mechanics imparts backaction and fundamentally impacts the measured object. In this work, we show how increasing the bias on the charge sensor (pink) changes the charge stability diagram of the double dot…

14 Apr 2023

World Quantum Day Fri Apr 14: Live from the SPIN Lab!

The World Quantum Day was celebrated with a flurry of acitivites around the globe, see official web page, https://worldquantumday.org/upcoming-events/ Some of our own activities: NCCR SPIN video 2023: What do our young researches think…

04 Apr 2023

Swiss radio show "Kontext" on Tinguely Entangled: quantum physics made audible

The Swiss Radio show "Kontext" had a special on the recent Tinguely Entangled performace, featuring Linda Leimane, Dominik Zumbühl and several others. The radio broadcast, "Klingende Quantenphysik: Wenn Musik den Quantencomputer erklärt",…

29 Mar 2023

US-CH Quantum Symposium at Uptown Basel

The US-CH quantum symposium brings together scientists working on quantum computing from both the United States and Switzerland at the Uptown Basel campus, combining efforts in academia and industry, on Mon/Tue March 27/28, 2023, organized…

26 Mar 2023

Tinguely Entangled: concert and art installation on spin qubits and quantum computation

The Tinguely Museum with its kinetic sculptures served as the stage for a performance of a piece of music especially composed by Linda Leimane in order to make some of the key quantum physics concepts lying at the heart of quantum computing…

18 Mar 2023

Simon Geyer Wins the APS Distinguished Student Award

Simon Geyer Wins the APS Distinguished Student Award

06 Mar 2023

On arXiv: Phase driving hole spin qubits

The spin-orbit interaction in spin qubits enables spin-flip transitions, resulting in Rabi oscillations when an external microwave field is resonant with the qubit frequency. Here, we introduce an alternative driving mechanism of hole spin…

06 Mar 2023

On arXiv: Hyperabrupt STO varactors for mK quantum dot reflectometry

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. We present a design employing…

05 Mar 2023

APS March Meeting 2023 Las Vegas

GaAs quantum wire tunneling spectroscopy F52.09 Length estimation of a finite length Q wire from finite size effects Henok Weldeyesus Ge/Si nanowire hole spin qubits N72.02 Hyperabrupt SrTiO3 Varactors for Reflectometry of Quantum Dots…

09 Feb 2023

Online Course: Spin-based Quantum Information Processing (SbQIP)

Our course "Spin-based Quantum Computing: Qubit Platforms" is opening for the spring semester 2023, with Stefano Bosco as the main lecturer. We will discuss how semiconductor spins can be used for quantum information processing, reviewing…

03 Jan 2023

QCQT PhD Fellowship awarded to Artemii Efimov

A full PhD fellowship of the QCQT PhD School is awarded to Artemii Efimov in recognition of the excellent MSc degree from the Moscow Institute of Physics and Technology (MIPT) and extended research experiences at Stockholm University, IST…

17 Dec 2022

Group Dinner 2022

Annual group dinner with tour de table of speeches from new and seasoned members as well as a number of group guests, accompanied by delicious dishes and drinks. A really nice get together in review of an eventful and successful year!…

11 Dec 2022

On arXiv: Two-qubit logic with anisotropic exchange in a fin field-effect transistor

Semiconductor spin qubits offer a unique opportunity for scalable quantum computation by leveraging classical transistor technology. Hole spin qubits benefit from fast all-electrical qubit control and sweet spots to counteract charge and…

04 Dec 2022

On arXiv: Charge-sensing of a Ge/Si core/shell nanowire double quantum dot using a high-impedance superconducting resonator

Hole spin qubits in Ge/Si core/shell nanowires are promising candidates for scalable quantum information processing. Readout based on the current through the nanowire is easy to implement but also slow and not scalable. We employ a…

25 Nov 2022

Dominique Trüssel defends STO varactors project

Dominique Trüssel has defended his honors thesis (Fri Sep 23) on STO varactors for spin qubit readout and has also completed the project report. The results are very impressive, with the STO varactors reaching the hyperabrupt regime with…