Departement News

Certifying the building blocks of quantum computers

Bell’s theorem has been proposed to certify quantum sources and measurements in a way that is independent of the imperfections of the actual implementation. The team of Prof. Sangouard showed how Bell’s theorem can be used to certify coherent operations for the storage, processing, and transfer of quantum information. This completes the set of tools needed to certify all building blocks of a quantum computer. These results have been published in Physical Review Letters and highlight by the SNF.

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Jelena Klinovaja promoted to rank of associate professor

Following outstanding evaluation by the tenure committee, approval by the Faculty of Natural Sciences, the Rectorate, and finally the Council of the University of Basel, Prof. Dr. Jelena Klinovaja was awarded tenure and promoted to the rank of associate professor.

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Quantum Technologies Flagship: Basel physicists participate in three research consortia

Today, the European Commission launched its flagship initiative on quantum technologies. Three research groups from the Department of Physics at the University of Basel are involved. The aim of the 1 billion euro research and technology funding program is to develop radically new and powerful quantum technologies by exploiting various quantum effects.

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Metal leads to the desired configuration

Scientists at the University of Basel have found a way to change the spatial arrangement of bipyridine molecules on a surface. These potential components of dye-sensitized solar cells form complexes with metals and thereby alter their chemical conformation. The results of this interdisciplinary collaboration between chemists and physicists from Basel were recently published in the scientific journal ACS Omega.

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ALL YOU CAN LEARN investigating phonons in a nanoscale heterostruture

Raman spectroscopy can allow the determination of lattice dynamics, chemical composition, strain level, and some electronic properties of semiconductors, including nanowires. In this work, we make a step forward in the use of Raman spectroscopy in nanowires by investigating for the first time the most challenging type of heterostructure in nanowires (a nanoscale heterostructure with constant material composition). The heterostructure is made by small (∼20 nm) domains with hexagonal crystal phase formed in cubic nanowires. We assess the phonon properties of hexagonal Ge and, remarkably, reconstruct the relative orientation of the cubic and hexagonal domains. Furthermore, information about the band structure alignment are inferred using phonons as a probe. The general procedure that we establish can be applied to several types of heterostructures. Published in Nano Letters and selected for a cover of the issue.

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Master in Physics: A Video-Testimonial by Märta Tschudin

Master Student Märta Tschudin on her graduate student experience at the University of Basel.

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Not so fast on modified gravity

An international group of astronomers including Oliver Müller from the University of Basel has debunked another premature claim that a leading modified gravity theory is dead – publishing their results in the prestigious journal Nature.

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Probing individual edge states with unprecedented precision

A new technique makes it possible to obtain an individual fingerprint of the current-carrying edge states occurring in novel materials such as topological insulators or 2D materials. Physicists of the University of Basel present the new method together with American scientists in “Nature Communications.”

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New mechanism of electron spin relaxation observed

Physicists at the University of Basel are working on using the spin of an electron confined in a semiconductor nanostructure as a unit of information for future quantum computers. For the first time, they have now been able to experimentally demonstrate a mechanism of electron spin relaxation that was predicted 15 years ago. The scientists also succeeded in keeping the direction of the electron spin fixed for almost a minute – a new record. The results of the collaboration with researchers from Japan, Slovakia and the US have been published in Nature Communications.

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