International Conference

• “Atom, Ion, All-photon Quantum Repeater" (Invited), Topical Conference on QuantumCommunication and Security, 17-18 December, 2019 (presented on 17), Kyoto Brighton Hotel, Kyoto, Japan.
• “Creating innovative non-traditional sciences and technologies based on quantum and related phenomena" (Invited), Moonshot International Symposium: Overview of Working Group, 17-18 December, 2019 (presented on 18), Kyoto Brighton Hotel, Kyoto, Japan.
• “Quantum Information Processing -- Similarities and Differences with Classical Information Processing --" (Invited), 22nd Workshop on Elliptic Curve Cryptography (ECC 2018), 19-21 September 2018 , (presented on 19), Osaka University, Suita, Japan.
• “Frequency conversion of single photons emitted from atom/ion quantum memory for telecommunications" (Invited), Japan-EU Joint Workshop on Advanced Quantum Technology for Future Innovation, 3-4 September 2018, Sorbonne University, Pierre & Marie Curie campus, Paris, (presented on 3).
• “Optical fiber-based quantum communication" (Invited), Coherent Control of Complex Quantum Systems C3QS2018, 17-20 April 2018, Seaside House, OIST, (presented on 17).  
• “Quantum communication and fundamental quantum physics" (Invited), CQT Colloquium, 2 November 2017, CQT, NUS, Singapore.  
• “Frequency-domain single-photon/two-photon interferometry”, Quantum Optics to Quantum Technologies, The Royal Society, London, 11-13 July 2017 (presented on 12).  
• “Frequency-qubit manipulation of photons” (Invited talk), Advances in Foundations of Quantum Mechanics and Quantum Technologies with atoms and photons (Quantum 2017), University of Torino, Italy, May 8-12 2017 (presented on 9 May 2017).  
• “Underlying technology in photonic quantum information processing” (Plenary Talk), ICQSA 2016 (International Conference on Quantum Science and Application), Center for Quantum Research and Applications, Eskisehir Osmangazi University, Eskisehir, Turkey, May 25-27, 2016 (presented on 2016). 
• “Frequency-domain quantum manipulation of photons using PPLN” (Invited talk), IWSSQC 7 (The 7th International Workshop on Solid State Quantum Computing), Nanjing University, China, July 2-4, 2015 (presented on 3). 
• “Entanglement Web Expansion” (Invited talk), APCWQIS 2014 (8th Asia Pacific Conference & Workshop on Quantum Information Science), National Cheng Kung University, Tainan, Taiwan, Decem. 12-15, 2014 (presented on 13). 
• “Frequency conversion of single photonswith high-fidelity quantum information preservation” (Invited talk), LPHYS'14 (23rd annual International Laser Physics Workshop), Sofia, Bulgariia, July 14-18, 2014 (presented on 17). 
• “Frequency conversion - towards hybrid quantum information processing” (Invited talk), Quantum 2014 (Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons), INRIM, Turin, Italy, May 26-30, 2014 (presented on 29). 
• “Two-state formalism” (Invited talk), The V Jubilee KCIK Symposium, National Quantum Information Centre in Gdansk, Sopot, Poland, May 22-24, 2014 (presented on 22). 
• “Quantum communication with lossy and noisy photonic channels” (Invited talk), Asia-Pacific Conference & Workshop onQuantum Information Science (APCWQIS2013), KIAS, Seoul, December 15-18, 2013 (presented on December 16). 
• “Quantum Communication and Computation with Interface between Memories and Propagating Signals” (Invited talk), The 6th International Workshop on Solid State Quantum Computing (IWSSQC6), Beijing, October 19-21, 2013 (presented on October 20). 
• “Towards long-distance photonics quantum communication” (Invited talk), Workshop on Photonics Foundations and Applications, Institute for Molecular Science (IMS), Okazaki, Aichi, 21 August 2013. 
• “Quantum communication with lossy and noisy photonic channels” (Invited talk), The international workshop on new science and technologies using entangled photons） ISIR, Osaka University, 8-9 July 2013 (presented on 8 July 2013). 
• “Two-state formalism and photonics quantum information processing” (Invited school lecture), The 11-th US-Japan Seminar, Nara Prefectural New Public Hall, April 4-12, 2013 (presented on April 4). 
• “Photonic quantum communications over lossy and noisy channels” (Invited talk), The 2nd OU-RuG Symposium on Particle-Nuclear and Condensed Matter Physics: New Challenges and Opportunities, Osaka Univ.. 27 Novem 2012. 
• “High-fidelity frequency down-conversion for nonclassical photons” (Invited talk), DYCE International Workshop, Prince Hotel Kussharo. 7-11, August 2012 (presented on 10 August). 
• “Photonic quantum communication with noisy and lossy channels” Quantum 2012 (Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons), 21-25, May, 2012, Turin, Italy  (presented on 24 May). 
• “Optical devices and quantum communications in the presence of loss and noise” Colloquium at Washington University, St. Louis. 2 March 2012.
• “Beyond quantum mechanics for further understanding quantum mechanics" Colloquium at The Research Center for Quantum Information, May 30 (Mon) 2011, Institute of Physics, Slovak Academy of Sciences, Bratislava.
• “Reversing operation sequence and its application" Czech Technical University Colloquium, May 24 (Tue) 2011, Czech Technical University, Prague. 
• “Photonic quantum information protection using DFS" Czech Technical University Colloquium, May 19 (Thu) 2011, Czech Technical University, Prague. 
• “Aren’t we too much restricting ourselves about quantum mechanics?" Doppler Seminar, May 17 (Tue) 2011, Czech Technical University, Prague. 
• “Weak measurement and its new aspect" Czech Technical University Colloquium, May 10 (Tue) 2011, Czech Technical University, Prague. 
• “Photonic multipartite entanglement" Czech Technical University Colloquium, May 4 (Wed) 2011, Czech Technical University, Prague. 
• “Basic Study of Quantum Information using Photons” (Invited talk), 2010 Osaka University-Shanghai Jiaotong University Joint Seminar on Optical Science and Engineering, Oct. 21, 2010, Shanghai Jiaotong University, China. 
• “Managing Multipartite Entanglement Using Photons” (Invited talk), The 4th International Symposium on Information Electronics Systems/CERIES-GCOE10, July 7--8, 2010, Sendai Excel Hotel Tokyu 3F, Sendai, Japan (Presented on July 8, 2010).
• “Quantum Nature of Photons and Optical Information” (Invited talk), The 4th Yamada Symposium on Advanced Photons and Science Evolution, 2010 (APSE 2010), 14-18 June 2010  (Presented on 14 June 2010), JICA Osaka.
• “Entanglement-based Photonic Information Processing” (Invited talk), International Conference on Core Research and Engineering Science of Advanced Materials (Global COE Program) Third International Conference on Nanospintronics Design and Realization (3rd-ICNDR), Osaka University Convention Center, 30 May - 4 June 2010 (Presented on 4 June 2010).
• “Managing multipartite entanglement” (Invited talk), 5th Workshop on "Advances in Foundation of Quantum Mechanics and Quantum Information with atoms and photons" 23-29 May 2010 (Presented on 25 May 2010), INRIM, Turin, Italy.
• “Sending Quantum Information into the Past by Measurement” (Invited talk), Naval Research Meeting "Entanglement Beyond the Optical Regime" 7-12 February 2010 (presented on 11 February), Doubletree Hotel, Orange, Anaheim CA.
• “Measurement and information --- Let's look inside the interferometer while it's working ---” (Invited talk), Waseda Meeting on "Quantum Technologies: Information and Communication" December 9-11, 2009  (presented on 9 December), Waseda University, Tokyo, Japan.
• “Today's art of photonic qubits” (Invited talk), Colloquium at Digital Materials Laboratory, Frontier Research System, RIKEN, 18 September, 2009, RIKEN, Saitama, Japan.
• “Experimental verification of anomalous weak value in an optical interferometer” (Invited talk), Colloquium at Max Planck Institute for Photonics, 6 July, 2009, Max Planck Institute for Photonics, Erlangen, Germany.
• “Backaction control in quantum measurement and anomalous weak value in an interferometer” (Invited talk), 6th Central European Quantum Information Processing Workshop, 2 June, 2009, Jindrichuv Hradec, Czech Republic.
• N. Imoto, "A brief review on Quantum Information/ Communication” (Invited talk) Stockholm University Colloquium, 2009/4/27, Stockholm University.
• “Multiparty-entanglement quantum information processing” UK-Japan Workshop on Quantum Information Workshop 22-23 January 2009  (presented on 22 February), at the New Hall, the British Embassy Tokyo, Japan.
• “Photonic quantum communication and quantum information processing” (Invited talk), International Symposium on Physics of Quantum Technology (ISPQT) 2008/11/25-28  (presented on 25 November), Nara Prefectural New Public Hall, Japan.
• “Photonic quantum information processing” Stuttgart University Colloquium, 2008/11/21, Stuttgart University.
• “Multipartite-entanglement quantum information processing” Stockholm University Colloquium, 2008/11/19.
• “Photonic quantum information processing” (Invited talk), The First Japanese-Polish Workshop on Quantum Entanglement and Quantum Computing, 2008/9/26, Adam Mickiewicz University, Poland.
• “Manipulating multipartite entanglement in photonic quantum information processing” (Invited talk), XII International Conference on Quantum Optics and Quantum Information (ICQIO'2008), 2008/9/20, Reval Hotel Lietuva, Vilnius, Lithuania.
• “Photonic implementation of quantum information processing” (Invited talk), Colloquium at Washington University, 2008/9/16, St. Louis, USA.
• “Implementation of basic quantum information processing” (Invited talk), CQT Colloquium, 2008/2/28 , National University of Singapore, Singapore.
• “Photonic Quantum Information Processing” (Invited talk), 2nd Int. Workshop on Materials Scienced and Nano-Engineering, 2007/12/1-5, Awaji Yumebutai Int. Conf. Center, Japan.
• “Entanglement manipulation" PAQ07, 2007/9/2-9/5 Royal Society, London.
• “Quantum Information Processing using Photons” (Invited talk), CLEO/Pacific Rim 2007 2007/8/26-8/31 COEX, Seoul, Korea.
• “Quantum information processing research for near/middle future” (Invited talk), Nara Advanced Interdisciplinary Workshop on Quantum Information Science (NAIST WS), Nara Institute of Science and Technology, Nara, Japan (January 25-26, 2007).
• “Quantum Information Processing with Linear Optics” (Invited talk), The 8th International Conference on Quantum Communication, Measurement and Computing (QCMC 2006) 2006/11/28-12/3, Tsukuba International Congress Center, Tsukuba, Japan.
• “Quantum information processing using linear optics” (Invited talk), US-Japan Joint Seminar on Fundamental Issues and Applications of Ultracold Atoms and Molecules, Beaver Run, Breckenridge, USA (August 25, 2006).
• “Entanglement manipulation” (Invited talk), Satellite Symposium of XII IC of Quantum Chemistry "Material-oriented Quantum Chemistry” (MOQC), Senri Life Science Center, Osaka, Japan (May 28, 2006).
• “Quantum Information Processing in view of Optics and Material Physics” Osaka Univ. Asia Pacific- Vietnam National University 2005/9/28 Honoi Forum International Convention Center, Hanoi, Vietnam
• “Entanglement Manipulation with Linear Optics” (Invited talk), CLEO/QELS 2005, Baltimore Convention Center2005/5/23.
• “Development of photonic quantum-information-processing functions” Int. Conf. on Nanoelectronics, Nanostructures and Carrier Interactions (NNCI 2005), Atsugi, Kanagawa, Japan, 2005/1/30-2/2.
• “Sending entangled photons: noisy-channel experiments and beyond QKD” (Invited talk), 1st Asia-Pacific Conference on Quantum Information Science, National Cheng Kung University, Tainan, Taiwan, 2004/12/9-14.
• “Useful linear and nonlinear optics in quantum information processing” (Invited talk), Photonics ASIA 2004, Beijing, China, 2004/11/10.
• “Quantum Information Processing with Realistic Linear and Nonlinear Optics” (Invited talk), OSA Topical Meeting on Nonlinear Optics: Materials, Fundamentals and Applications (NLO'04) August 2, 2004 Waikoloa Beach Marriott, Hawaii.
• “Mirrors in Time Domain” (Invited talk), The Seventh International Conference on Quantum Communication, Measurement and Computing (QCMC'04) July 28, 2004 University of Strathclyde, Glasgow, July 28, 2004.
• “Entanglement manipulation with realizable linear and nonlinear optics” (Invited talk), International Symposium on Quantum Info-Communications and Related Quantum Nanodevices, March 11-12, 2004, Mita Kyodo Kaigisho, Mita, Minato-ku, Tokyo, Japan.
• “Quantum information processing with photons” International Symposium on Mesoscopic Superconductivity and Spintronics 2004 (MS+S2004) March 1-4, 2004, NTT R&D Center, Atsugi, Kanagawa, Japan.
• “Entanglement manipulation with realizable linear and nonlinear optics” (Invited talk) Budmerice Focus Meeting on Few Qubit Quantum Information Processing, December 11-14, 2003, Budmerice, Slovakia.
• “Entanglement manipulation by photonic quantum-information processing” (Invited talk), International Conference on Quantum Information, November 1-3, 2003, Morito Memorial Hall, Tokyo University of Science.
• “Quantum information processing by linear optics” (Invited talk), The 9th Japan-US Joint Seminar Quantum Correlation and Coherence, September 17-19, 2003.
• “Quantum Information Carried by Photons and Atoms” (Invited talk), Symposium on The Molecular Structural Basis of Information Reception and Transfer, June 25, 2003, The Science Council of Japan, Roppongi, Tokyo.
• “Multi-qubit operation with linear optics and state reduction” (Invited talk), CISN2003, NTT Atsugi Research Center, March 12, 2003, Atsugi, Japan.
• “Preparation and Mode Matching Problem” (Invited talk), Waseda International Symposium on Fundamental Physics - New Perspectives in Quantum Physics, Waseda University, 12-15 November 2002, Tokyo, Japan.
• “Quantum information processing using linear optics” (Invited talk), NTT BRL Summer Camp, Hotel Dai-Hakone, Sept. 3, 2002, Hakone, Japan.
• “Quantum Information and its Manipulation using Linear Optics” (Invited, co-authored by M. Koashi, S. K. Ozdemir, and T. Yamamoto) International Conference on Quantum Communication, Measurement and Computing, , MIT, July 22-26, 2002, Boston.
• “Processing/transforming quantum states” (Invited talk), Japan-Italy Joint Forum, Chiba Workshop on Quantum Information, Quantum Computerand Complex System 2001, October 1-2 (2001).
• “Synthesizing and processing of quantum states” (Invited talk), ERATO Workshop on Quantum Information Science (EQIS'01), Tokyo, September 6-8 (2001).
• “Quantum technologies and protocols other than QKD” (Invited talk), The European Commision Conference on Quantum Interference and Cryptographic Keys: novel physics and advancing technologies (QUICK'01), Cargeses, Corsica, France, April. 7-13 (2001).
• “Collective/individual manipulation and entanglement for qubit information control” International Symposium on Carrier Interactions in Mesoscopic Systems (CIM2001), Atsugi, Japan, Feb. 13-14 (2001).
• “Quantum key distribution and its variations” (Invited talk), US-Japan Seminar 2000 on Coherent Quantum Systems, Newport, Rhode Island, USA, 2000.9.18-21.
• “General principle and possible applications of quantum cryptography” (Invited talk), 5th International Conference on Quantum Communication Measurement and Computing, Capri, Italy, 2000.7.3-8.
• “Quantum Protocols - Concept, Feasibility, Applications” (Invited talk), Symposium on the Impact of 20th Century Scientific Revolutions on the Contemporary Science/Technology, Tokyo, Feb. 25 (2000).
• “Designing Quantum Magic Protocols” The NEC Workshop on Quantum Cryptography, Princeton, Dec. 13-15 (1999).
• “Quantum cryptography” (Invited talk), The Pacific Rim Conference on Lasers and Electro-Optics (CLEO Pacific Rim '99), Renaissance Seoul Hotel, Seoul, Korea, Aug.1-Sept.3, 1999.
• “A possibility of quantum magic protocols” (co-authored by M. Koashi and K. Shimizu) The Second Workshop on Algorithms in Quantum Information processing (AQIP '99), DePaul University, Chicago, Illinois USA, January 18-24, 1999.
• “Single photon communications” (Invited talk), International Topical Workshop on Contemporary Photonic Technologies (CPT'99), Sendai International Center, Japan, Jan. 12-14, 1999.
• “Possible Future Derections of Quantum Information” Quantum Computing Pathfinder Conference, Paasitorni Conference Centre, Helsinki, Sept. 26-28, (presented on 28) 1998.
• “Quantum cryptography and Magic Protocols” (co-authored by M. Koashi and K. Shimizu) International Symposium on Foundations of Quantum Mechanics (ISQM-Tokyo'98), Hitachi Basic Research Laboratories, Saitama, Aug. 24-27, 1998.
• “Quantum cryptography based on photon interferometry” (co-authored by M. Koashi) 4th International Conference on Quantum Communication Measurement, and computing (QCM'98), Northwestern University, Evanston, Aug. 22-29, 1998.
• “Limit of controlling quantum bits by coherent lights” (co-authored by K. Igeta and M. Koashi) US-Japan Seminar on Manipulation of Matter by Coherent Light, Kusatsu, Sept. 1-5, 1997.
• “Quantum Information Processing --- Quantum Cryptography and Quantum Computing” (Tutorial Lecture, Invited talk) The Pacific Rim Conference on Laser and Electro-Optics (CLEO/Pacific Rim '97), Chiba, July 14-18, 1997, Tut I.
• “Quantum Cryptography --- toward realization under realistic conditions ---” (Invited, co-authored by M. Koashi, K. Shimizu, and B. Huttner) Fifth Central-European Workshop on Quantum Optics, Prague, April 25-28, 1997.
• “Quantum Effects of Spatial/Temporal Modulation of the Optical Field” (Invited talk), The 6th NEC Symposium on Fundamental Approaches to New Material Phases, Karuizawa, Japan, October 13-17, 1996.
• “Quantum Effect of Modulation and Multi-Photon Interfernece” (Invited talk), Third International Conference on Quantum Communication and Measurement (QCM'96), Hakone, Japan, September 25-30.
• “Quantum Cryptography using Two-Photon Interference” (Invited, co-authored by M. Werner and M. Koashi) XXth International Quantum Electronics Conference (IQEC'96), Sydney, Australia, July 14-19, 1996, FK5.
• “Quantum Information Processing” (Invited talk), Quantum Optics Workshop, Cairns, Australia, July 8-9, 1996.
• “Decoherence and Error in a Two-State Logic Element”, International Workshop on Quantum Mechanical Computer, Osaka National Research Institute, Osaka, December 19-20, 1995.
• “Coherent/incoherent field-matter interaction due to the quantum nature of pi and pi/2 pulses” (Invited talk), 5th ISSP International Symposium "Frontiers in Laser Physics and Spectroscopy", Tokyo, November 8-10, 1995.
• “Quantum Information Processing” (Invited talk), 1995 Annual Meeting of Korean Physical Society, Taejon, October 27-28, 1995.
• “Coherence in two-particle interferometry” (co-authored by B Huttner) The 5th Internasional Symposium on Foundations of Quantum Mechanics (ISQM-Tokyo '95), Hatoyama, August 21-24, 1995.
• “Two-particle interferometry: coherence and indistinguishability” (Invited talk), University of Electro-Communications International Symposium, Tokyo, 17-19, August, 1995.
• “Two-atom interferometry” (co-authored by B. Huttner, M. Mitsunaga, and T. Mukai) Research Conference on Quantum Optics, Davos, Switzerland, 24-29 September, 1994.
• “Incomplete quantum measurement and quantum cryptography” The Rank Prize Funds Mini-Symposium on Quantum Communication ﾂ･& Cryptography, Broadway, Worcetershire, UK, 29 March-1 April, 1993.
• “Quantum mechanical treatment of a propagating optical beam” (co-authored by J. Jeffers, and R. Loudon) NATO Advanced Research Workshop on Quantum Measurements in Optics, Cortina d'Ampezzo, Italy, January 21-25, 1991/Proceedings: Quantum Measurement in Optics edited by P. Tombesi and D. F. Walls (Plenum Press, New York, 1992) pp.295-311.
• “Theory of non-ideal quantum-nondemolition measurement and continuous state reduction of photonic state in view of unsharp measurement” (co-authored by M. Ueda, and T. Ogawa) Symposium on the Foundations of Modern Physics, Joensuu, Finland 13-17 August, 1990/Proceedings: edited by Pekka Lahti and Peter Mittelstaedt (World Scientific, Singapore, 1991), pp.148-159.
• “Fibre interferometry and guided acoustic wave Brillouin scattering for optical pulses” The Rank Prize Funds Mini-Symposium on Nonlinear Optical Fibre Pulse Processing, Grasmere, UK,10-13 Sept. 1990.
• “Optical beam quantization and QND detection of a propagating beam with loss” The Rank Prize Funds Mini-Symposium on Nonclassical Light for Communication, Grasmere, UK,30 April-3 May, 1990 (Invited talk).
• “Quantum treatment of a spatially evolving beam with feedback” Symposium on nonclassical light, Weizmann Institute of Science, Rehovot, Israel, 19-23 April 1990 (Invited talk).
• “Interchanging time and space in quantum mechanics for analyzing spatial evolution of an optical beam” The Third International Symposium on Foundation of Quantum Mechanics (ISQM-Tokyo'89), 28-30 August 1989/Proceedings: edited by S-I. Kobayashi et al., The Physical Society of Japan, pp.306-314, 1990.
• “Quantum state controll and nondemolition detection of photons” (Invited talk), Tirrenia International Conference on Coherent Communcation and Photonic Switching, Tirrenia, Italy, 19-23 Sept. 1989 (Invited talk)/Proceedings: edited by G. Prati, Elsevier, pp.187-202, 1989.
• “Recent progress in non-classical photonic communication” (Invited, Keynote Address) Y. Yamamoto, S. Machida, S. Saito, and M. Kitagawa) 14th Europian Conference on Optical Communications (ECOC'88), Brighton, UK, 12-15 Sept. 1988 (Invited Keynote Address).
• “Quantization of spatially evolving optical wave and QND measurement of photon number in a lossy optical Kerr medium” (Invited, co-authored by S. Saito) International Conferene on Quantum Electronics (IQEC'88), WB-8, Tokyo, 18-21 July 1988.
• “Quantization of an optical beam and quantum non-demolition measurement” (Invited, co-authored by S. Saito) Conference on Optical Communication Theory (COCT) '87, Karuizawa, August 1987 (Invited talk).
• “Quantum nondemolition detection” (Invited, co-authored S. Saito, Y. Yamamoto, and T. Yanagawab) US.-Japan Seminar, Monterey, USA, June 1987 (Invited talk).
• “Quantum nondemolition measurement of photon number in optical communication” (Invited, co-authored by Y. Yamamoto) CLEO'86, San Francisco, USA, 9-12 June 1986, ThE4.
• “Silica waveguide grating filter” (co-authored by N. Shimizu and M. Ikeda) IOOC'83, Tokyo, 1983, 29A-4.