The Nano- and Quantum Electronics group at the Department of Physics of the University of Basel is welcoming applications for an experimental postdoctoral fellowship: www.nanoelectronics.ch

The project is part of a National Centre of Competence in Research (NCCR), named “Spin”, recently selected by the Swiss NSF. This long-term project aims to advance semiconductor-based spin-qubits to a level where quantum-error correction can be demonstrated. It starts with single and two qubit gates and will evolve to a network of qubits that interact via photonic quantum busses.

The fellowship will take part in a dynamic network of researchers with collaborators from IBM, ETHZ and EPFL. The current project will first focus on circuit-QED with single spin-qubits, i.e. the interaction of a single electron or hole spin in a quantum dot defined in a semiconductor that couples via spin-orbit interaction to the photon field of a microwave resonator. Specifically, we will start with qubits defined in GeSi-nanowires. Next, qubit-qubit coupling shall be demonstrated. The vision is to define single spin-qubits directly embedded in a microwave stripline as shown in the artistic view above.

(a,b) GeSi core-shell nanowire with bottom-gates allowing to define a quantum dot electrostatically. The gate-fields also enable to tune the spin-orbit interaction, which is crucial when multiple quantum dots are attached to a single photon cavity. (c) shows a l/2-resonator (the fine line) realized in a superconducting film of NbTiN with a zoom in (c) showing single semiconducting nanowire devices (see also inset).

We are looking for a highly motivated physicist who is keen to explore fundamental aspects of quantum devices and who has been done an experimental PhD work before. You will design and fabricate your own devices using tailored nanowires and state-of-the-art micro- and nanofabrication.

All members are expected to work in a team and collaborate with other PhD students and postdoctoral fellows within the group and within the NCCR network. Start of the project is 1st Jan. 2021 or later. The duration is first set to one year with the provision for extensions for further years. Requirement: you need to have a profound understanding of quantum and solid-state physics, have done a PhD work in the field of low-temperature quantum transport. You should be skilled in micro- and nanofabrication and low signal data-acquisition in cryogenic environment down to Milli-Kelvin temperature using dilution refrigerators.

To apply: please email to Christian.Schoenenberger@unibas.ch your curriculum vitae including names and contact info of referees and scanned copies of University grades. Please submit a motivation letter, in which you explain why this position is what you were looking for, why you are eager to perform experimental lab work and why you are convinced that a postdoctoral fellow is the right next step for you. You should also dwell on your background in solid-state physics and quantum science. I expect that you have a very good background in experimental research and a high level of understanding of solid-state physics, quantum physics and quantum optics.