QDev Faculty

Charles Marcus

Charlie Marcus is a  Professor at the Niels Bohr Institute and University of Washington, Seattle. Charlie was raised in Sonoma, California, and studied at Stanford (undergraduate) and Harvard University (PhD). Before coming to Copenhagen in 2011, he also taught Physics at Stanford and Harvard. His research interests have varied over the years, from neural networks as a graduate student to quantum chaos and mesoscopic physics, nanotubes, graphene, nanowires, and more recently quantum information and qubits. Much of his research is now focused on the realization of non-abelian excitations in solid state systems, including superconductor-semiconductor hybrid structures and fractional quantum Hall systems. Charlie lives with his wife and two children in Seattle, travelling to Copenhagen for work with his reach group.

Karsten Flensberg

Karsten Flensberg works in the research group Solid State Physics and is a co-founder of Center for Quantum Devices (QDev). Karsten Flensberg works with theoretical many-body and solid-state physics in relation to quantum mechanic effects on nanostructures and superconductors - especially in context of quantum information systems and electron transport in molecular transistors and quantum dots.

Jesper Nygård

My activities cover mainly carbon nanomaterials and semiconductor nano wires grown in-house. When turned into electronic devices they enable investigations and control of quantum phenomena, our core QDev activity. Progress relies on the ability to optimise the microstructure of materials and interfaces, thus we keep one foot in materials science. Interestingly, our devices can also be useful in biosensing,  molecular electronics and photovoltaics – we pursue some of these applications in the Nano-Science Center. My teaching covers quantum transport and solid state physics.

Jens Paaske

I work on theoretical many-body physics, with a strong emphasis on correlated electrons in solid state systems. This includes problems of quantum transport either in bulk materials or through low-dimensional nano-junctions such as wires, dots and single molecules. The intricate interplay between correlation, and non-equilibrium effects remains a central theme in my research, a good part of which is rooted in the experimental QDev activities.

Martin Leijnse

I am a theoretical condensed matter physicist primarily interested in nanoscale systems. On such small length scales, the physics is drastically different from what we know in our all-day life and is dominated by the laws of quantum mechanics. I investigate different ways of taking advantage of quantum mechanics to design for example electronic components with desirable properties.

Thomas Sand Jespersen

I am an associate professor working with experimental low temperature quantum transport at the Center for Quantum Devices. My research focuses on the physics of semiconductor nanowires couples to superconductors and on mesoscopic phenomena in strongly correlated electron systems emerging at the interfaces of complex oxide heterostructures.

Ferdinand Kuemmeth

My focus centers on practical quantum design and cryogenic electric manipulation and readout techniques. By choosing the material, geometry and boundary conditions, we create nanodevices with well/controlled, often surprising spin-electronic properties. Low-dimensional semiconductors such as nanowires and 2D electron gases challenge us to harness the role of spin-orbit coupling, type of confinement, and the interplay between conduction band, valence bands, and superconductivity.

Peter Krogstrup

Peter Krogstrup finished his PhD in physics in October of 2012, at the Niels Bohr Institute, University of Copenhagen. Today, he is working as a professor at QDev, as a part of the Microsoft Station Q project with a specific focus on growing nanowire crystals that not only can produce majorana particles, but also control them. His main research interests are the field between material science and quantum transport with an ambition to produce new materials for future quantum electronic applications. Currently, his focus is directed towards controlling the formation of heterostructure III-V/superconductor nanowires for topological superconductor devices.

Anasua Chatterjee

I work on small-scale quantum circuits, using high-frequency readout and control techniques to simulate and explore fundamental physical properties of matter. My research interests as an experimental physicist span the intertwined fields of fundamental condensed matter physics and quantum information. They include quantum simulation, superconductivity, light-matter interaction and spin qubit arrays. High-frequency techniques allow us to reach very short readout timescales, while machine learning algorithms open up new ways of exploring the properties of complex nanodevices.

Morten Kjaergaard

My research is focused on the use of superconducting quantum bits as a platform to investigate quantum algorithms, quantum fault-tolerance and quantum verification and validation protocols. Superconducting qubits are one of the few quantum computing modalities that support not only quantum device experiments but also quantum information experiments. We use them as a platform to study foundational questions related to quantum fault tolerance, generation and measurement of entanglement, efficient verification and validation protocols as well as small scale quantum algorithms and protocols.

   

Saulius Vaitiekėnas

I am an experimental condensed matter physicist primarily interested in novel phases in hybrid systems. Hybrid quantum materials allow for quantum phases that otherwise do not exist in nature. For instance, in hybrid systems comprised of ferromagnetic and superconducting components, competition to align electron spins or pair them into singlets can result in unconventional superconductivity with broken time-reversal symmetry. I design quantum devices based on such hybrid materials and use various transport techniques to explore the emerging complex ground states and corresponding electrical properties.