Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip

Alexander S. Solntsev, Frank Setzpfandt, Alex S. Clark, Che Wen Wu, Matthew J. Collins, Chunle Xiong, Andreas Schreiber, Fabian Katzschmann, Falk Eilenberger, Roland Schiek, Wolfgang Sohler, Arnan Mitchell, Christine Silberhorn, Benjamin J. Eggleton, Thomas Pertsch, Andrey A. Sukhorukov, Dragomir N. Neshev, and Yuri S. Kivshar Centre for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra 0200, Australian Capital Territory, Australia Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany CUDOS, the Institute of Photonics and Optical Science (IPOS), School of Physics, University of Sydney, New South Wales 2006, Australia Universität Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany University of Applied Sciences Regensburg, Prüfeninger Strasse 58, 93049 Regensburg, Germany CUDOS, School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria 3001, Australia (Received 8 January 2014; revised manuscript received 12 May 2014; published 14 July 2014)