Superconducting technology is one of the main challengers in the race to develop quantum computers. Currently, state-of-the-art circuits include a few tens of qubits (quantum supremacy was demonstrated using a 53-qubit processor) and are made using a single-layer process; but we need to move to at least two layers to enable further scaling to ~1000 qubits and beyond. One way to achieve this is to use so-called through-silicone-vias (TSVs). TSVs are already in use in the semiconductor industry but the standard process is not compatible with high-quality qubits.
The main objective of this project is to develop superconducting, low-loss, TSVs compatible with superconducting qubits. The work will be done within collaboration with three partners: National Physical Laboratory (NPL), University of Glasgow and Oxford Instruments Plasma Technology (OIPT). A new fabrication process will be established in the James Watt Nanotechnology Centre (JWNC) at Glasgow https://www.gla.ac.uk/research/az/jwnc/ in collaboration with OIP; the resulting TSVs will be characterised using the measurement facilities at NPL.
The challenge is to make TSVs that both have low-loss low loss at millikelvin temperatures and do not introduce any additional decoherence mechanisms (due to e.g. material defects) that would degrade the performance of the qubits. The level of scientific ambition in this project can be scaled as appropriate: from simple test structures to multi-qubit circuits.
As a student you will have access to state-of-the-art facilities and be supported by world-leading experts. You will gain expertise will be in modelling and fabrication of quantum circuits, measurement using advanced microwave setups, data processing, cryogenics, and quantum technologies.
The funding is for a full EPSRC studentship for 4 years. The studentships are open to UK and EU residents, see student eligibility: https://epsrc.ukri.org/skills/students/guidance-on-epsrc-studentships/eligibility/
How to apply
Informal enquiries may be made to Tobias Lindstrom firstname.lastname@example.org at National Physical Laboratory or Martin Weides Martin.Weides@glasgow.ac.uk at University of Glasgow.Please submit your application with supporting documents by 29th of February 2020=
University of Glasgow
James Watt School of Engineering, Rankine Building, Oakfield Avenue,
G12 8LT Glasgow, United Kingdom
Published on February 05, 2020