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Prof. Dr. Dominik Zumbühl

Department of Physics
Profiles & Affiliations

Projects & Collaborations

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Ultra high precision electron beam lithography system for nanodevice and nanostructures definition

Research Project  | 6 Project Members

In the last decades nano- and quantum-science have been steadily growing in large part also thanks to the availability of ever more advanced processing, manipulation, and imaging tech-niques. Specifically, nanofabrication has been the leading enabler of experiments and devices, in which quantum mechanics play a key role. The University of Basel is nationally and internationally recognized as a leader innanoscience and nanotechnology. It was the leading house of the National Center in Competence and Re-search (NCCR) on Nanoscience, which later became the Swiss Nanoscience Institute (SNI). The University of Basel is leading the NCCR SPIN for the realization of spin qubits in Silicon and is also co-leading the NCCR QSIT on Quantum Science and Technology (with ETHZ as Leading House). The present proposal to the SNF R'Equip scheme is a joint effort of six principal investigators (PIs) in the physics department of the University of Basel, who work on current topics in quantum- and nano-science. The PIs, who submit this proposal together, do research that relies on the availability of state-of-the-art fabrication tools, such as an electron beam lithography (EBL) system. The proposal makes the case for the purchase of an ultra-high precision EBL system that combines high resolution, tunable acceleration voltages, different write-field size, ultra-high precision alignment, proximity correction, and mechanical stability. This combination is unique and crucial for the University of Basel to stay at the forefront of nano-science and technology. The system will be installed in the new clean room shared between the University of Basel and the Department of Biosystem Science and Engineering of the ETH. Therefore, the purchased system will be available for the users of the clean-room.

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NCCR SPIN Spin Qubits in Silicon

Research Project  | 11 Project Members

The main objective of NCCR SPIN is to develop reliable, fast, compact, scalable spin qubits in silicon and germanium. The vision is to control single spins with electrical means. Fast control of individual spins can be achieved with electrical pulses via a spin-orbit interaction. The spin-orbit interaction is either inherent (hole spin) or synthetic (electron spin in a magnetic field gradient). It also allows neighbouring spins to be coupled together electrically via superconducting resonators or floating gates. The specific aim of the first phase of the project is to develop the silicon spin qubits and spin-spin coupling strategies. Beyond fundamental research on the qubits and their architecture, there are further research efforts in many related areas of quantum computing, such as quantum error correction, quantum information, quantum algorithms and software, qubit control electronics and cryo-MOS, NISQ applications and algorithms. The long term goal is fault-tolerant universal quantum computing with a large number of logical qubits. The NCCR SPIN team consists of researchers from the University of Basel , IBM Research - Zurich , ETH Zurich , and EPF Lausanne . The team members are experts from various disciplines, such as quantum physics, materials science, engineering and computer science. In addition to the collaboration between academia and industry, the NCCR SPIN is characterized by very close links between theory and experiment as well as physics, materials science and engineering. The home institution is the University of Basel .