Objective Computers that use quantum superposition and entanglement are set to revolutionise how the world stores, processes, and communicates information. At the heart of quantum computers are building blocks known as qubits. Despite huge progress over the last decade, building a large number of interacting qubits protected from the environment remains a major challenge. One emerging solution makes use of elements comprising semiconducting nanowires with superconducting contacts. These profit from electric-field control and scalable methods to couple qubits. One natural implementation would be to use a two-dimensional electron gas (2DEG) as the semiconducting element. Recent measurements on indium arsenide 2DEG Josephson junctions are extremely promising, but the microwave response of 2DEGs is unknown and the substrate/gate dielectrics might limit qubit performance. To address these challenges I will fabricate scalable hybrid Josephson junctions in different 2DEGs. I will then readout the state of excitations in the 2DEG using microwave spectroscopy. Finally, I demonstrate operation of a 2DEG qubit with coherence times in the few μs range. What qualifies me to carry out this research is my experience with low-temperature measurements of nanodevices. To establish a group exploiting new discoveries in quantum technologies I require a deeper direct knowledge of quantum control techniques and experience working directly with industrial partners. I will acquire these skills by working at the Centre for Quantum Devices (QDev) at the University of Copenhagen under the supervision of Prof. Charles Marcus, a world-leader in the field. I will learn new research skills related to sophisticated microwave circuits while gaining valuable experience working in collaboration with top scientists at Microsoft Station Q. Introducing new 2D materials could also open exciting new collaborations with QDev and create future platforms for realising topological phases of matter. Fields of science natural scienceschemical sciencesinorganic chemistrypost-transition metalsengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcomputer hardwarequantum computersnatural sciencesphysical scienceselectromagnetism and electronicssemiconductivitynatural sciencesphysical scienceselectromagnetism and electronicssuperconductivitynatural sciencesphysical sciencesopticsspectroscopy Keywords Qubits Programme(s) H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions Main Programme H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility Topic(s) MSCA-IF-2016 - Individual Fellowships Call for proposal H2020-MSCA-IF-2016 See other projects for this call Funding Scheme MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF) Coordinator KOBENHAVNS UNIVERSITET Net EU contribution € 200 194,80 Address NORREGADE 10 1165 Kobenhavn Denmark See on map Region Danmark Hovedstaden Byen København Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 200 194,80
