Research focuses on quantum transport experiments investigating quantum coherence, electron spins and nuclear spins and interactions in semiconductor and graphene nanostructures. Ongoing projects include
We are interested in coherent manipulation of individual quantum systems in solid state nanostructures with quantum computation as a long term goal.
Experiments investigate quantum transport through semiconductor nanostructures which are fabricated in house using high mobility 2D electron gas materials obtained from collaborating molecular beam epitaxy labs. Experiments are typically performed in dilution refrigerators at millikelvin temperatures in magnetic fields. Measurements are done using electronic low-noise techniques and may involve nanosecond-pulsing and microsecond readout schemes.
Positions are currently available, please see the positions page.
We are affiliated with
Our group enjoys numerous ongoing collaborations, including the following groups (in arbitrary order)
17 Nov 13:15
21 Nov 14:00
PhD Defense Pirmin
1 Dec 13:15
Understanding and control of the spin relaxation time T1 is among the key challenges for spin based qubits. A larger T1 is generally favored, setting the fundamental upper limit to the qubit coherence and spin readout fidelity. We establish the prediction of hyperfine-phonon spin relaxation experimentally, by measuring T1 over an unprecedented range of magnetic fields and report a maximum T1=57±15 s at the lowest fields, setting a new record for the spin lifetime in a nanostructure.
An interdisciplinary team from the University of Basel, ETH Zurich, and University College London have developed a new method that can be used to analyze individual live mammalian cells within a cell assembly. Based on a system of tiny cantilever probes, the technique records the cell mass over several days in millisecond steps and is accurate to within a few picograms. Using the new technique, the scientists have been able to observe for the first time that the cell mass fluctuates within the space of a few seconds. These findings and the new platform provide fundamental insights into the regulation of cell mass and into how this is disrupted in the event of illness. The study was presented today in the journal Nature.