Interference experiments with superconducting microwave beam splitter

Superconducting quantum circuit is one of the most promising way for realization of quantum systems. Quite interesting effects in superconducting quantum systems can be observed involving single photons interference[1]. To conduct these type of experiments, different devices like single-photon sources and an element for entanglement generation are required. The most natural realization for such element is a beam splitter [2]. In microwave range, it is convenient to use a hybrid beam splitter [1]. It is natural to use a beam splitter on-chip for less insertion losses. In the talk, the investigation of this kind of beam splitter with proposed interference experiments will be reported.

[1] C. Lang, C. Eichler, L. Steffen, J.M. Fink, M.J. Woolley, A. Blais, and A. Wallraff. Correlations, indistinguishability and entanglement in Hong–Ou–Mandel experiments at microwave frequencies. Nature Physics, 9(6):345, 2013.
[2] Gregor Weihs and Zeilinger. Photon statistics at beam-splitters: an essential tool in quantum information and teleportation. Coherence and Statistics of Photons and Atoms, pages 262–288, 2001.