The main strength of superconducting qubit technology is its scalability. It builds on many decades of experience in fabricating microelectronic circuits. However, further scale-up is hindered by relatively short coherence time of the qubits, despite a 1000x improvement over the 15 years, and system engineering issues. In order to meet these challenges we require reliable data, or metrology, to identify and eliminate the sources of decoherence in circuits, calibrate control lines, test and validate qubits, develop recognised standards.
At NPL, we are developing world-leading measurement methodologies, tools and techniques which support scale-up of quantum information processors. We are also using our facilities and expertise in this area to explore the use of novel materials such as highly disordered superconductors and topological insulators in quantum electrical standards.
Our research includes the:
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