M. Chemnitz, S. Sciara, B. Fischer, Benjamin Crockett, P. Roztocki, Hao Yu, Zhiming Wang, R. Morandotti, B. Little, S. Chu, D. Moss
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Generation of densely-spaced time-bin entangled qubits on a chip
We present a compact scheme for the integrated generation of densely-spaced time-bin entangled two-photon qubits using an on-chip unbalanced interferometer and a spiral waveguide. We show quantum interference with visibilities as high as 99%.