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UCL (UK)

UCL University College London, United Kingdom

UCL has a global reputation for excellence in research and is committed to delivering impact and innovations that enhance the lives of people in the UK, across Europe and around the world. UCL is consistently placed in the global top 20 across a wide range of university rankings (currently 4th in the QS World University Rankings with a score of 98.9). Furthermore, the Thomson Scientific Citation Index shows that UCL is the 2nd most highly cited European university and 14th in the world. UCL’s total competitively awarded research income annually stands at a €530 million, of which 10% is European funded research & innovation.

UCL is one of the leading recipients of European Framework Programme grants, with over 700 projects funded during the Seventh Framework Programme (FP7) including more than 100 prestigious European Research Council awards. UCL also receives the highest share of any UK university of the UK Government’s strategic investment fund, and has recently invested more than €310 million into state-of-the-art infrastructure to facilitate cutting-edge research across a broad range of disciplines. UCL hosts a number a number of national Centres for Doctoral Training (CDTs), most notably for this proposal, the CDT in Delivering Quantum Technology, running for 8 years and providing 10-12 outstanding PhD students per year with bespoke training in quantum engineering and information technology.

Main tasks in MOS-QUITO:
  • Development of quantum Control toolbox for large-scale integrated spin qubits
  • Measurement and control of donor spin and hybrid donor-dot qubits
Previous experience, skills and facilities relevant to the tasks in MOS-QUITO:
  • Expertise in high-fidelity coherent control of donor electron and nuclear spins in silicon
  • Expertise in low temperature DC and microwave measurement of spins in silicon nanodevices, including transport and RF reflectometry
  • Expertise in the quantum information processing theory, including robust quantum architectures
Key persons related to the proposal at UCL:

Prof John J. L. Morton is Professor of Nanoelectronics & Nanophotonics at UCL, and leads the Quantum Spin Dynamics research group. He has a played a key role in the development of donor spin qubits in silicon. He first showed how the nuclear spin of P donors could be used as a quantum memory for electron spins [Nature 455 1085 (2008)], and demonstrated the first on-demand quantum entanglement between electron and nuclear spins in an ensemble, using P donors in Si [Nature 470 69 (2011)]. More recently, he and his collaborators have shown that donor spins in silicon have the longest coherence times of any solid state systems: 3 seconds for the electron spin [Nature Nanotechnology 8 561 (2013)], 3 minutes for the neutral donor nuclear spin [Science 336 6086 (2012)] and up to 3 hours for the ionised donor nuclear spin [Science 342 830 (2013)].
Morton has also shown how Stark shifts of donors can be used to perform conditional control on nuclear spins, using electric fields [Phys Rev Lett 113 157601 (2014)]. Most recently, working together with collaborators on this proposal, namely CEA and Hitachi Cambridge Laboratory, Morton’s team has shown that how donors and dots can be coupled to form singlet and triplet states in a finFET structure, showing spin blockade [Urdampilleta et al., arXiv:1503.01049 (2015)].
Morton’s awards include the Nicholas Kurti European Science prize (2008) and the Institute of Physics Moseley Medal (2013) in experimental physics. He has published over 80 papers in the past 10 years with over 3700 citations and has an h-index of 29. He is active in the public engagement of science, including public exhibitions, documentaries, radio broadcasts and popular articles on quantum science and technology.

Chatterjee Anasua

Dr Eva Dupont-Ferrier is a Marie Curie Fellow based in the Quantum Spin Dynamics group at UCL since 2015. Eva is an expert in Quantum Information Science exploring a variety of systems for qubit implementation including superconducting circuits, spins of dopants and quantum dots. While working in the CEA Grenoble team she demonstrated the coupling of two dopants embedded in a nano-MOSFET (Phys. Rev. Lett. 108, 206812 (2012)) and established the first coherent charge coupling between two such dopants (Phys. Rev. Lett. 110, 136802 (2013)), an important step towards a scalable quantum architecture using standard microelectronic devices. On a broader perspective she is developing hybrid architectures coupling spins to other degrees of freedom. In 2014 she established spin optomechanical coupling (Phys. Rev. Lett. 112, 010502 (2014)) and she is now exploring coupling mechanisms of dopant spins in silicon to superconducting quantum circuits..

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