Microwave devices are ubiquitus. You have it in your cell phone to satellites and even the recent developments in the field of quantum computation. These devices and circuits are always hungry for high-Q filters, resonators and components for which superconductors are precisely suited. Starting from tunable filters to coplanar waveguides superconductors are already in use in many places. We are exploring the idea of type-II superconductor based on-chip RF components. Wide variety of type-II materials including those with Iron, have special capabilities and can provide extremely wide range of tunability.
In the field of quantum optics, photon number resolution is much appreciated capability for experiments. While semiconductor based single photon detectors exists, we are working on single photon detectors with capabilities to resolve the photon energy with meV precision. Superconducting tunnel diodes will be employed for this approach and photons ranging from micro/milli wave to X-rays can be detected at gigahertz speed
Photon qubits is a promising alernative to this currently employed qubit architectures. The idea is to develop a solid-state on-demand entangled photon pair by using the superconducting proximity effect. Entangled electrons in a superconductor will be used to recombine with holes in a traditional light emitting structure. This will enable the transformation of the entanglement from the Cooper-pairs to photons. These photons can now we used to several applications such as secure quantum communication and quntum computation and teleporation.