Detection of Weak Microwave Fields with an Underdamped Josephson Junction
G. Oelsner, Christian Kraglund Andersen, Marian Rehak, Matthias Schmelz, Solveig Anders, M. Grajcar, Uwe Hübner, Klaus Mølmer, E. V. Il’ichev · Physical Review Applied · 2017
Quantum information processing based on light has invigorated research on the production and detection of single photons. The authors present an innovative detection scheme for weak microwave signals, based on a superconducting current-biased Josephson junction. In contrast to detectors that absorb photons, this system is optimized such that the amplitude of the classical photon field triggers detection.