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.