Basel Universität

Welcome to the web page of the Quantum Coherence Lab
at the Department of Physics, University of Basel!

Research focuses on quantum transport experiments investigating quantum coherence, electron spins and nuclear spins and interactions in semiconductor and graphene nanostructures. Ongoing projects include

- spin qubits in coupled, laterally gated GaAs quantum dots
- microkelvin temperatures in nanoscale sample
- novel quantum states of matter, such as electron or nuclear spin helices, topological states and Majorana fermions
- spin-orbit coupling in GaAs quantum wells - experiments investigating mesoscopic electron transport, including graphene nanoribbon research

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.

An ERC Starting Grant from the first ERC call was awarded to our group and boosted our research from 2008-2013. press release.

We are affiliated with
- Department of Physics, University of Basel
- Swiss Nanoscience Institute (SNI)
- Basel QC2 Center for Quantum Computing and Quantum Coherence
- Harvard Nanoscale Science and Engineering Center (NSEC) of the US National Science Foundation and
- NCCR Quantum Science and Technology - NCCR QSIT of the Swiss NSF. QSIT video

Our group enjoys numerous ongoing collaborations, including the following groups (in arbitrary order)
- Schönenberger group, Basel (nano-electronics, fabrication)
- Loss group, Basel (theory)
- Gossard group at UC Santa Barbara (MBE growth)
- Wegscheider group, ETH Zurich (MBE growth)
- Pfeiffer group, Princeton University (MBE growth)
- Yacoby group, Harvard University (GaAs quantum wires)
- Awschalom group, University of Chicago (persistent spin helix and spin-orbit coupling in GaAs quantum wells)
- Egues group, Sao Paulo University (theory)
- Pekola group, Aalto University, Helsinki (Coulomb blockade thermometry)
- Lancaster group (George Pickett), England (nuclear refrigeration)
- European microkelvin collaboration, ultra-low temperature physics and techniques (EU FP7 integrating activity)
- BaselCryogenics, Low temperature filtering and thermalization