Single microwave photon detection

When hit by one MW photon of frequency close to ωp, the trapped electron’s cyclotron oscillator increases its energy in one quantum. This fundamental process can be measured accurately, thus the trapped electrons are efficient transducers of microwave quantum radiation. In this project, funded by an EPSRC Quantum Technology fellowship we will build a practical single microwave photon detector, where trapped electrons will be the sensors of the microwave fields. We have the strong cooperation of the group of Dr Ian Hepburn of UCL and his pioneering Adiabatic Demagnetisation  Refrigerator system. As a single microwave photon detector the Geonium Chip will provide:

Tuneable, Broadband detection range

Quantum Non Demolition detection

High quantum efficiency

Coherent connectivity to other quantum systems

Scalability and low cost

Cryostat Drawing2     DSCF1841