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Quantum Coherence Lab - Zumbühl Group

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ULT

ULT2025: Frontiers of Low Temperature Physics, Lancaster University

Lancaster University, United Kingdom, Aug 15-19, 2025. https://www.lancaster.ac.uk/physics/research/ult-2025/ The ultra-low temperature (ULT) physics meeting covers broadly the bottom end of the temperature spectrum including various…

compromise-free

Published in Nature Communications: Compromise-free scaling of qubit speed and coherence

Across various qubit platforms, a common trade-off persists: increasing coherence comes at the cost of operational speed, reflecting the notion that protecting a qubit from its noisy surroundings also limits control over it. This…

LL tunneling

Published in Nature Communications: Dominant end-tunneling in two coexisting Luttinger liquids 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…

QDP100

QDP100: Quantum Designers Special Edition: 100 years of Quantum Physics

Palacio Miramar, Donostia - San Sebastian, Basque Country, Spain, Jul 14-18, 2025. https://qd100.dipc.org/ This special edition of the workshop celebrates the Year of Quantum Science and Technology in the inspiring setting of San…

disp

On arXiv: Edge State Selective Measurement of Quantum Hall Dispersions

Quantum materials such as topological insulators or superconductors have attracted great interest for their exciting fundamental physics as well as potential applications in quantum technologies. Such systems have a gapped bulk decorated…

Maryam

Maryam Taghilou joins as a Postdoctoral researcher

With a Ph.D degree from the University of Tehran, Maryam is starting as a postdoctoral researcher in our group on the innovation project on low temperature techniques. Welcome to the group, Maryam, and best wishes!

GenQ

GenQ call for 51 doctoral fellowships

The new international doctoral programme in quantum science and technologies “Gen-Q” opens call for 51 doctoral positions at 📍: University of Basel, The University of Freiburg, Université de Haute-Alsace - UHA, University of Strasbourg,…

Omid

PhD defense of Omid Sharifi Sedeh

Omid Sharifi Sedeh successfully defended his PhD thesis on Friday 27th of June. "Microkelvin quantum devices: pushing the limits of cooling and thermometry", with Dr. Eddy Collin (CNRS, Grenoble) as external referee, Prof. Christian…

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…

QD-photon

On arXiv: High-Efficiency Tunable Microwave Photon Detector

High-efficiency single-photon detection in the microwave domain is a key enabling quantum technology. The extremely low energy of microwave photons in the micro-eV range presents a fundamental challenge, preventing direct photon-to-charge…

Iago

Iago Rosetto joining as a Master thesis student

With a Bachelor degree from Aalto University, Iago is starting his Master Thesis in our group to work on cryo probing of silicon FET devices for qubit operations in collaboration with Semiqon!

Prabha

Prabha Navaratnam joining as an intern student

Prabha Navaratnam is a high school student working on new filtering technology in collaboration with Dr. Christian Scheller. Welcome to the group, Prabha, and best wishes!

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…

5LG

Published in Nature: 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…

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