1. Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
2. Optical Quantum Computing Research Team, RIKEN Center for Quantum Computing, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
3. Advanced ICR Research Institute, National Institute of Information and Communications Technology, 588-2 Iwaoka, Nishi, Kobe 651-2492, Japan.
4. Graduate School of Engineering, Kobe University, 1-1 Rokko-dai, Nada, Kobe 657-0013, Japan.
5. Department of Optics, Palacky University, 17. listopadu 1192/12, 77146 Olomouc, Czech Republic.
6. Institute of Physics, Johannes-Gutenberg University of Mainz, Staudingerweg 7, 55128 Mainz, Germany.