NPL has 30 years of experience in the development and application of highly accurate measurement techniques based on superconducting quantum technologies, particularly the application of Josephson junctions for voltage metrology. NPL also have experience in the fabrication and development of nanobridge Josephson junction circuits for SFQ readout and voltage metrology. Both 300 mK and 4 K systems will be available throughout the project. NPL also have full access to the nanofabrication facilities established at RHUL.

In this JRP, the main technical tasks of NPL are related to the characterisation and validation of the JTWPA devices as well as the further development of microwave single-photon technologies in order to validate the JTWPA at the single photon limit.