Papers after 1985 (Quantum Optics, Quantum Information).

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Frequency-Multiplexed Photon Pairs Over 1000 Modes from a Quadratic Nonlinear Optical Waveguide Resonator with a Singly Resonant Configuration, Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki, Shigehito Miki, Masahiro Yabuno, Hirotaka Terai, Nobuyuki Imoto, and Takashi Yamamoto, Physical review letters 123, 193603_1-6, (2019); DOI:https://doi.org/10.1103/PhysRevLett.123.193603 (Published 8 November 2019).

Frequency-multiplexed singly-resonant photon pairs from a quadratic nonlinear waveguide resonator, Rikizo Ikuta, Ryoya Tani, Masahiro Ishizaki, Shigehito Miki, Masahiro Yabuno, Hirotaka Terai, Nobuyuki Imoto, Takashi Yamamoto, 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) DOI: 10.1109/CLEOE-EQEC.2019.8872176 (Date of Conference: 23-27 June 2019).

Timing jitter characterization of the SFQ coincidence circuit by optically time-controlled signals from SSPDs, Shigehito Miki, Shigeyuki Miyajima, Masahiro Yabuno, Taro Yamashita, Takashi Yamamoto, Nobuyuki Imoto, Rikizo Ikuta, Robert A Kirkwood, Robert H Hadfield, Hirotaka Terai, IEEE Transactions on Applied Superconductivity, vol.29, no.5, pp.1-4 (2019); Digital Object Identifier 10.1109/TASC.2019.2906258 (Published on 27 March 2019).

Frequency comb generation in a quadratic nonlinear waveguide resonator, Rikizo Ikuta, Motoki Asano, Ryoya Tani, Takashi Yamamoto, Nobuyuki Imoto, Proc. SPIE 10904, Laser Resonators, Microresonators, and Beam Control XXI, 109040G (4 March 2019); doi: 10.1117/12.2507751.

Experimental time-reversed adaptive Bell measurement towards all-photonic quantum repeaters, Yasushi Hasegawa, Rikizo Ikuta, Nobuyuki Matsuda , Kiyoshi Tamaki, Hoi-Kwong Lo, Takashi Yamamoto, Koji Azuma & Nobuyuki Imoto, Nature Communications volume 10, Article number: 378 (2019); https://doi.org/10.1038/s41467-018-08099-5 (Published on line 29 January 2019).

Quantum key distribution with setting-choice-independently correlated light sources, Akihiro Mizutani, Go Kato, Koji Azuma, Marcos Curty, Rikizo Ikuta, Takashi Yamamoto, Nobuyuki Imoto, Hoi-Kwong Lo & Kiyoshi Tamaki, npj Quantum Informationvolume 5, Article number: 8 (2019); https://doi.org/10.1038/s41534-018-0122-y (Published on line 23 January 2019).

Negation of photon loss provided by negative weak value, Kazuhiro Yokota and Nobuyuki Imoto, Journal of Physics Communications Vol. 2, 065013_1-9 (2018), https://doi.org/10.1088/2399-6528/aacccb (Published 27 June 2018).

Superconducting coincidence photon detector with short timing jitter, S. Miki, S. Miyajima, M. Yabuno, T. Yamashita, T. Yamamoto, N. Imoto, R. Ikuta, R. A. Kirkwood, R. H. Hadfield, and H. Terai, Appl. Phys. Lett. 112, 262601 (2018); https://doi.org/10.1063/1.5037254 (Published on line 26 June 2018).

Frequency comb generation in a quadratic nonlinear waveguide resonator, Rikizo Ikuta, Motoki Asano, Ryoya Tani, Takashi Yamamoto, and Nobuyuki Imoto, Optics Express Vol. 26, Issue 12, pp. 15551-15558 (2018), https://doi.org/10.1364/OE.26.015551 (Published 6 June 2018).

Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network, Rikizo Ikuta, Toshiki Kobayashi, Tetsuo Kawakami, Shigehito Miki, Masahiro Yabuno, Taro Yamashita, Hirotaka Terai, Masato Koashi, Tetsuya Mukai, Takashi Yamamoto & Nobuyuki Imoto, Nature Communications 9, 1997 (2018), doi:10.1038/s41467-018-04338-x (Published 21 May 2018).

Long-Distance Single Photon Transmission from a Trapped Ion via Quantum Frequency Conversion, Thomas Walker, Koichiro Miyanishi, Rikizo Ikuta, Hiroki Takahashi, Samir Vartabi Kashanian, Yoshiaki Tsujimoto, Kazuhiro Hayasaka, Takashi Yamamoto, Nobuyuki Imoto, and Matthias Keller, Phys. Rev. Lett. 120, 203601_1-5 (2018); DOI:10.1103/PhysRevLett.120.203601 (Published 15 May 2018).

Optimal nonlocal conversion of photonic four-partite entanglement from two Bell pairs in quantum networks, Yuki Takeuchi, Nobuyuki Imoto, and Toshiyuki Tashima, A 97, 042341_1-15 (2018); DOI: 10.1103/PhysRevA.97.042341 (Published 25 April 2018).

Various pointer states approaches to polar modular values, Le Bin Ho and Nobuyuki Imoto, Journal of Mathematical Physics 59, 042107 (2018); doi: 10.1063/1.5000990 (Published 17 April 2018).

High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources, Yoshiaki Tsujimoto, Motoki Tanaka, Nobuo Iwasaki, Rikizo Ikuta, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto, Scientific Reports 8, 1446 (2018), doi:10.1038/s41598-018-19738-8 (Published 23 Jan. 2018).

Generalized modular-value-based scheme and its generalized modular value, Le Bin Ho and Nobuyuki Imoto Phys. Rev. A 97, 012112, DOI:https://doi.org/10.1103/PhysRevA.97.012112 (Published 16 Jan. 2018).

Circuit configurations which may or may not show superradiant phase transitions, Motoaki Bamba and Nobuyuki Imoto Phys. Rev. A 96, 053857, DOI: 10.1103/PhysRevA.96.053857 (Published 27 Novem. 2017).

Experimental demonstration of robust entanglement distribution over reciprocal noisy channels assisted by a counter-propagating classical reference light, R Ikuta, S Nozaki, T Yamamoto, M Koashi, N Imoto, Scientific Reports 7, doi:10.1038/s41598-017-05008-6 (Published 6 July 2017).

High visibility Hong-Ou-Mandel interference via a time-resolved coincidence measurement, Yoshiaki Tsujimoto, Yukihiro Sugiura, Motoki Tanaka, Rikizo Ikuta, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, and Nobuyuki Imoto, Optics Express, Vol 25, No. 11, 12069_12080, DOI: 10.1364/OE.25.012052 (Published 15 May 2017).

Mach-Zehnder interferometer using frequency-domain beamsplitter, Toshiki Kobayashi,1 Daisuke Yamazaki, Kenichiro Matsuki, Rkizo Ikuta, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Takashi Yamamoto, Masato Koashi and Nobuyuki Imoto, Optics Express, Vol 25, No. 10, 012052_1_9, DOI: 10.1364/OE.25.012052 (Published 12 May 2017).

Differential-phase-shift quantum-key-distribution protocol with a small number of random delays, Yuki Hatakeyama, Akihiro Mizutani, Go Kato, Nobuyuki Imoto, and Kiyoshi Tamaki, Phys. Rev. A95, 042301_1_14, DOI: 10.1103/PhysRevA.95.042301 (Published Published 3 April 2017).

Generalized modular-value-based scheme and its generalized modular value, Le Bin Ho and Nobuyuki Imoto Phys. Rev. A 95, 032135, DOI: 10.1103/PhysRevA.95.032135 (Published 31 March 2017).

Visible light emission from a silica microbottle resonator by second- and third-harmonic generation, M. Asano, S. Komori, R. Ikuta, N. Imoto, S. K. Ozdemir, and T. Yamamoto, Optics Letters Vol. 41, Issue 24, pp. 5793-5796 (2016), https://doi.org/10.1364/OL.41.005793 (Published 15 Decem.2016).

When a negative weak value -1 plays the counterpart of a probability 1, Kazuhiro Yokota and Nobuyuki Imoto, New J. Phys. 18 (2016) 123002(2016), DOI: 10.1088/1367-2630/18/12/123002 (Published 2 Decem.).

Anomalous time delays and quantum weak measurements in optical micro-resonators, M. Asano, K. Y. Bliokh, Y. P. Bliokh, A. G. Kofman, R. Ikuta, T. Yamamoto, Y. S. Kivshar, L. Yang, N. Imoto, S.K. Ozdemir & F. Nori, Nature Communications Volume 7, 13488 (2016), DOI: 10.1038/ncomms13488 (Published 14 Novem.).

Heralded single excitation of atomic ensemble via solid-state-based telecom photon detection, Rikizo Ikuta, Toshiki Kobayashi, Kenichiro Matsuki, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Takashi Yamamoto, Masato Koashi, Tetsuya Mukai, and Nobuyuki Imoto, Oprica Volume 3, Issue 11, pp.1279-1284 (2016), DOI: https://doi.org/10.1364/OPTICA.3.001279 (Published 31 Oct.).

Maxwell boundary conditions imply non-Lindblad master equation, Motoaki Bamba and Nobuyuki Imoto, Phys. Rev. A 94, 033802 (2016). DOI:http://dx.doi.org/10.1103/PhysRevA.94.033802 (Published 1 Sept., 2016).

Observation of optomechanical coupling in a microbottle resonator, Motoki Asano, Yuki Takeuchi, Weijian Chen, Sahin Kaya Ozdemir, Rikizo Ikuta, Nobuyuki Imoto, Lan Yang, Takashi Yamamoto, Laser & Photonics Reviews Volume 10, Issue 4, pages 603-611 (2016), DOI: 10.1002/lpor.201500243 (Published 14 July).

Stimulated Brillouin scattering and Brillouin-coupled four-wave-mixing in a silica microbottle resonator, Motoki Asano, Yuki Takeuchi, Sahin Kaya Ozdemir, Rikizo Ikuta, Lan Yang, Nobuyuki Imoto, and Takashi Yamamoto, Opt.Exp. Vol. 24, Issue 11, pp. 12082-12092 (2016), doi: 10.1364/OE.24.012082 (Published 25 May).

Full characterization of modular values for finite-dimensional systems, Le Bin Ho and Nobuyuki Imoto, Physics Letters A 380 (2016), pp. 2129-2135, DOI: 10.1016/j.physleta.2016.05.005 (Available online 4 MAY 2016, Final version published online: 11-MAY-2016).

Controlling slow and fast light and dynamic pulse-splitting with tunable optical gain in a whispering-gallery-mode microcavity, M. Asano, S. K. Ozdemir, W. Chen, R. Ikuta, L. Yang, N. Imoto and T. Yamamoto, Appl. Phys. Lett. 108, 181105-1-5 (2016), DOI: 10.1063/1.4948922 (Published 6 May 2016).

Blind quantum computation over a collective-noise channel, Yuki Takeuchi, Keisuke Fujii, Rikizo Ikuta, Takashi Yamamoto, and Nobuyuki Imoto, Phys. Rev. A 93, 052307-1-10, (2016) DOI:http://dx.doi.org/10.1103/PhysRevA.93.052307 (Published 4 May 2016).

Frequency domain Hong-Ou-Mandel Interference, Toshiki Kobayashi, Rikizo Ikuta, Shuto Yasui, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Takashi Yamamoto, Masato Koashi and Nobuyuki Imoto, Nature Photonics (19 April 2016) doi:10.1038/nphoton.2016.74.

Security of quantum key distribution with light sources that are not independently and identically distributed, Yuichi Nagamatsu, Akihiro Mizutani, Rikizo Ikuta, Takashi Yamamoto, Nobuyuki Imoto, and Kiyoshi Tamaki, Phys. Rev. A 93, 042325-1-10 (18 April 2016) DOI:http://dx.doi.org/10.1103/PhysRevA.93.042325.

Robustness of the round-robin differential-phase-shift quantum-key-distribution protocol against source flaws, Akihiro Mizutani, Nobuyuki Imoto, and Kiyoshi Tamaki, Phys. Rev. A 92, 060303(R)-1-6 (30 December 2015).

Distillation of photon entanglement using a plasmonic metamaterial, Motoki Asano, Muriel Bechu, Mark Tame, Sahin Kaya Ozdemir, Rikizo Ikuta, Durdu O. Guney, Takashi Yamamoto, Lan Yang, Martin Wegener and Nobuyuki Imoto, Scientific Reports 5, 18313 (16 Decem. 2015) doi:10.1038/srep18313.

Finite-key security analysis of quantum key distribution with imperfect light sources, Akihiro Mizutani, Marcos Curty, Charles Ci Wen Lim, Nobuyuki Imoto and Kiyoshi Tamaki,New J. Phys. 17 (9 Sept. 2015) 093011.

Extracting an entangled photon pair from collectively decohered pairs at a telecommunication wavelength, Yoshiaki Tsujimoto, Yukihiro Sugiura, Makoto Ando, Daisuke Katsuse, Rikizo Ikuta, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Optics Express Vol. 23, Issue 10, pp. 13545-13553 (May 14, 2015) doi: 10.1364/OE.23.013545.

Fabrication and Characterization of Superconducting Nanowire Single-Photon Detectors on Si Waveguide, Kentaro Waki, Taro Yamashita, Shin-ichiro Inoue, Shigehito Miki, Hirotaka Terai, Rikizo Ikuta, Takashi Yamamoto, and Nobuyuki Imoto, IEEE Trans. Appl. Supercon. 25 2200704 (2014).

Optimal two-qubit tomography based on local and global measurements: Maximal robustness against errors as described by condition numbers, Adam Miranowicz, Karol Bartkiewicz, Jan Perina, Jr., Masato Koashi, Nobuyuki Imoto, and Franco Nori, Phys. Rev. A 90, 062123_1_12 (2014). (published 18 December 2014)

Measurement-Free Topological Protection Using Dissipative Feedback, Keisuke Fujii, Makoto Negoro, Nobuyuki Imoto, and Masahiro Kitagawa, Phys. Rev. X 4, 041039_1_11 (2014). (published 1 December 2014)

Quantum algorithm for an additive approximation of Ising partition functions, Akira Matsuo, Keisuke Fujii, and Nobuyuki Imoto, Phys. Rev. A 90, 022304_1_16 (2014). (published 5 August 2014)

A weak-value model for virtual particles supplying the electric current in graphene: the minimal conductivity and the Schwinger mechanism, Kazuhiro Yokota and Nobuyuki Imoto, New Journal of Physics 16, 073003_1_15 (2014). (published 2 July 2014)

Measurement-device-independent quantum key distribution for Scarani-Acin-Ribordy-Gisin 04 protocol, Akihiro Mizutani, Kiyoshi Tamaki, Rikizo Ikuta, Takashi Yamamoto and Nobuyuki Imoto, Scientific Reports 4, 5236 (2014). (published 11 June 2014)

Frequency down-conversion of 637 nm light to the telecommunication band for non-classical light emitted from NV centers in diamond, Rikizo Ikuta, Toshiki Kobayashi, Shuto Yasui, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, Zhen Wang, and Nobuyuki Imoto, Optics Express, Vol. 22, Issue 9, pp. 11205-11214 (2014). (published 1 May 2014).

Universal gates for transforming multipartite entangled Dicke states, Toshiki Kobayashi, Rikizo Ikuta, Sahin Kaya Ozdemir, Mark Tame, Takashi Yamamoto, Masato Koashi and Nobuyuki Imoto, New Journal of Physics, Vol.16, pp.023005-1-9 (2014) (published 4 Feb. 2014).

Observation of two output light pulses from a partial wavelength converter preserving phase of an input light at a single-photon level, Rikizo Ikuta, Toshiki Kobayashi, Hiroshi Kato, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masahide Sasaki, Zhen Wang, Masato Koashi, and Nobuyuki Imoto, Optics Express, Vol. 21, Issue 23, pp. 27865-27872 (2013). (published 6 Nov 2013).

Nonclassical two-photon interference between independent telecommunication light pulses converted by difference-frequency generation, Rikizo Ikuta, Toshiki Kobayashi, Hiroshi Kato, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, Zhen Wang, and Nobuyuki Imoto, Phys. Rev. A 88, 042317 (2013)-1-4, (2013 October 13).

Robustness of quantum communication based on a decoherence-free subspace using a counter-propagating weak coherent light pulse, Hidetoshi Kumagai, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A 87, 052325 (2013)-1-8, (2013 May 28).

Fundamental limit to qubit control with coherent field, Kazuhiro Igeta, Nobuyuki Imoto, and Masato Koashi, Phys. Rev. A 87, 022321 (2013)-1-8, (2013 February 21).

High-fidelity conversion of photonic quantum information to telecommunication wavelength with superconducting single-photon detectors, Rikizo Ikuta, Hiroshi Kato, Yoshiaki Kusaka, Shigehito Miki, Taro Yamashita, Hirotaka Terai, Mikio Fujiwara, Takashi Yamamoto, Masato Koashi, Masahide Sasaki, Zhen Wang, and Nobuyuki Imoto, Phys. Rev. A 87, 010301(R)-1-4, (2013 January 2).

A strange weak value in spontaneous pair productions via a supercritical step potential, Kazuhiro Yokota and Nobuyuki Imoto, New Journal of Physics 14, 083021-1-11 (2012 August).

Quantum repeaters and computation by a single module: Remote nondestructive parity measurement, Koji Azuma, Hitoshi Takeda, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A85, 062309-1-7 (2012 June).

Wide-band quantum interface for visible-to-telecommunication wavelength conversion, R. Ikuta, Y. Kusaka, T. Kitano, H. Kato, T. Yamamoto, M. Koashi, and N. Imoto, Nature Communications 10.1038/ncomms1544 (2011 Novem.).

An optical fusion gate for W-states, S. K. Ozdemir, E. Matsunaga, T. Tashima, T. Yamamoto, M. Koashi, and N. Imoto, New J. Phys. 13 103003 (2011).

Cheat-sensitive commitment of a classical bit coded in a block of m x n round-trip qubits, Kaoru Shimizu, Hiroyuki Fukasaka, Kiyoshi Tamaki, and Nobuyuki Imoto, Phys. Rev. A84, 022308 (2011).

Efficient decoherence-free entanglement distribution over lossy quantum channels, Rikizo Ikuta, Yohei Ono, Toshiyuki Tashima, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. Lett. 106, 110503 (2011).

Optimal local expansion of W states using linear optics and Fock states, Rikizo Ikuta, Toshiyuki Tashima, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A83, 012314 (2011).

Demonstration of Local Expansion Toward Large-Scale Entangled Webs, Toshiyuki Tashima, Tsuyoshi Kitano, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto: Phys. Rev. Lett. 105, 210503 (2010).

Comparison of timing jitter between NbN superconducting single-photon detector and avalanche photodiode, T. Seki, H. Shibata, H. Takesue, Y. Tokura, N. Imoto: Physica C 470, 1534-1537 (2010).

Tight bound on coherent-state-based entanglement generation over lossy channels, Koji Azuma, Naoya Sota, Masato Koashi, and Nobuyuki Imoto Phys. Rev. A81, 022325 (2010) (February 25, 2010).

Optimal entanglement generation for efficient hybrid quantum repeaters, Koji Azuma, Naoya Sota, Ryo Namiki, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A80, 060303(R):1-4 (2009).

Boosting up quantum key distribution by learning statistics of practical single-photon sources, Yoritoshi Adachi, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto, New J. Phys. 11. 113033 (2009).

Local Transformation of Two Einstein-Podolsky-Rosen Photon Pairs into a Three-Photon W State, Toshiyuki Tashima, Tetsuroh Wakatsuki, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. Lett. 102, 130502 (2009).

Direct observation of Hardy's paradox by joint weak measurement with an entangled photon pair, Kazuhiro Yokota, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto, New J. Phys. 11, 033011(2009). IOP press release - Quantum paradox directly observed - a milestone in quantum mechanics

Local expansion of photonic W state using a polarization dependent beamsplitter, Toshiyuki Tashima, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto, New J. Phys. 11, 023024 (2009).

Compact Toffoli gate using weighted graph states, M.S. Tame, S.K. Ozdemir, M. Koashi, N. Imoto, and M.S. Kim, Phys. Rev. A{79}, 020302(R) (2009).

Quantum nondemolition measurement of photon number via optical Kerr effect in an ultra-high-Q microtoroid cavity, Y. Xiao, S. K. Ozdemir, V. Gaddam, C. Dong, N. Imoto, and L. Yang, Opt. Express {16}, 21462-21475 (2008).

Fidelity Criterion for Quantum-Domain Transmission and Storage of Coherent States Beyond the Unit-Gain Constraint, Ryo Namiki, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. Lett. 101, 100502-1-4 (2008)(September 2008).

Robust photonic entanglement distribution by state-independent encoding onto decoherence-free subspace, Takashi Yamamoto, Kodai Hayashi, Sahin Kaya Ozdemir, Masato Koashi and Nobuyuki Imoto, Nature Photonics 2, 488 - 491 (2008).

Generation of High-Fidelity Four-Photon Cluster State and Quantum-Domain Demonstration of One-Way Quantum Computing, Yuuki Tokunaga, Shin Kuwashiro, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. Lett. 100, 210501 (2008).

Elementary optical gate for expanding an entanglement web, Toshiyuki Tashima, Sahin Kaya Ozdemir, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A77, 030302(R) (2008).

Playing games in quantum mechanical settings: Features of quantum games, S. K. Ozdemir, J Shimamura, N Imoto, Mathematical Aspects of Quantum Computing 2007 1, 139.

Simple and Efficient Quantum Key Distribution with Parametric Down-Conversion, Yoritoshi Adachi, Takashi Yamamoto, Masato Koashi, Nobuyuki Imoto, Phys. Rev. Lett. 99, 180503 (2007).

Experimental ancilla-assisted qubit transmission against correlated noise using quantum parity checking, T. Yamamoto, R. Nagase, J. Shimamura, S. K. Ozdemir, M. Koashi, and N. Imoto, New J. Phys. 9 191(2007) chosen in IOP Select.

Selective entanglement breaking, Y. Kinoshita, R. Namiki, T. Yamamoto, M. Koashi, and N. Imoto, Phys. Rev. A75, 032307 (2007).

A necessary and sufficient condition to play games in quantum mechanical settings, S. K. Ozdemir, J. Shimamura, and N. Imoto, New Journal of Physics, 9, 43 (2007).

Selective truncations of an optical state using projection synthesis, A. Miranowicz, S. K. Odemir, J. Bajer, M. Koashi, and N. Imoto, J. Opt. Soc. Am. B, 24, 379-383 (2007).

Quantum entanglement and teleportation of quantum-dot states in microcavities, A. Miranowicz, S. K. Odemir, Yu-xi Liu, G. Chimczak, M. Koashi and N. Imoto, e-Journal of Surface Science and Nanotechnology 5, 51-059 (2007).

Nuclear Spins in a Nanoscale Device for Quantum Information Processing, S. K. A. Ozdemir, A. Miranowicz, T. Ota, G. Yusa, N. Imoto, and Y. Hirayama, e-Journal of Surface Science and Nanotechnology 5, 51-059 (2007).

Faithful Quantum Communication Over Noisy Environment, T. Yamamoto, S. K. Ozdemir, M. Koashi, and N. Imoto, IEEE LEOS NEWSLETTER Vol 20, Number 6, 4-10 (Dec. 2006).

Fidelity estimation and entanglement verification for experimentally produced four-qubit cluster states, Y. Tokunaga, T. Yamamoto, M. Koashi, and N. Imoto, Phys. Rev. A74, 020301(R) (23 August 2006).

Nanometre-scale nuclear-spin device for quantum information processing, Y. Hirayama, A. Miranowicz, T. Ota, G. Yusa, K. Muraki, S. K. Ozdemir, and N. Imoto, J. Phys.: Condens. Matter vol.18, S885 (2006).

Cloning and optimal Gaussian individual attacks for continuous- variable quantum key distribution using coherent states and reverse reconciliation, Ryo Namiki, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A73, 032302 (2 March 2006).

Probabilistic cloning with supplementary information, Koji Azuma, Junichi Shimamura, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A72, 032335 (28 September 2005).

Faithful Qubit Distribution Assisted by One Additional Qubit against Collective Noise, T. Yamamoto, J. Shimamura, S. K. Ozdemir, M. Koashi, and N. Imoto, Phys. Rev. Lett. 95, 040503 (22 July 2005).

Simple experimental scheme of preparing a four-photon entangled state for the teleportation-based realization of a linear optical controlled-NOT gate, Yuuki Tokunaga, Takashi Yamamoto, Masato Koashi, and Nobuyuki Imoto, Phys. Rev. A71, 030301(R) (25 March 2005).

Optical control of a qubit under power constraint, K. Igeta; N. Imoto; M. Koashi, International Quantum Electronics Conference, 2005. 14-18 July 2005, Pages: 1452 - 1453, DOI: 10.1109/IQEC.2005.1561102, IEEE Conference Publications.

Threshold quantum cryptography, Y. Tokunaga, T. Okamoto, and N. Imoto, Phys. Rev. A71, p.012314 (10 January 2005).

Dynamics of a discoordination game with classical and quantum correlations, S. K. Ozdemir, J. Shimamura, F. Morikoshi, and N. Imoto, Physics Letters A, vol.333, p.218, (25 October 2004).

Kraus representation of a damped harmonic oscillator and its application, Yu-xi Liu, S. K. Ozdemir, A. Miranowicz, and N. Imoto, Phys. Rev. A70, p.042308 (12 October 2004).

Entangled states that cannot reproduce original classical games in their quantum version, J. Shimamura, S. K. Ozdemir, F. Morikoshi and N. Imoto, Physics Letters A, vol.328, p.20, (1 June 2004).

Exciton entanglement in two coupled semiconductor microcrystallites, Yu-xi Liu, S. K. Ozdemir, A. Miranowicz, M. Koashi, and N. Imoto, Journal of Physics A: Mathematical and General, (29 March 2004).

Quantum advantage does not survive in the presence of a corrupt source: Optimal strategies in simultaneous move games, S. K. Ozdemir, J. Shimamura, and N. Imoto, Physics Letters A, vol.325, p.104, (19 March 2004).

Quantum and classical correlations between players in game theory, J. Shimamura, S. K. Ozdemir, F. Morikoshi, and N. Imoto, International Journal of Quantum Information, vol.2, p.79, (January 2004).

Quantum state generation and entanglement manipulation using linear optics, S. K. Ozdemir, T. Yamamoto, M. Koashi, and N. Imoto, Turkish Journal of Physics, 27, pp.459-479 (8 September 2003).

Unconditionally secure key distribution based on two nonorthogonal states, K. Tamaki, M. Koashi, and N. Imoto, Physical Review Letters, 90, p.167904 (24 April 2003).

Security of the Bennett 1992 quantum-key distribution protocol against individual attack over a realistic channel, K. Tamaki, M. Koashi, and N. Imoto, Physical Review A67, p.032310 (26 March 2003).

Size-dependent decoherence of excitonic states in semiconductor microcrystallites, Yu-xi Liu, A. Miranowicz, Sahin K. Ozdemir, M. Koashi, and N. Imoto, Physical Review A67, p.034303 (25 March 2003).

Communication channels analogous to one out of two oblivious transfers based on quantum uncertainty. II. Closing EPR-type loopholes, K. Shimizu and N. Imoto, Phys. Rev. A67, 034301 (2003).

Experimental extraction of an entangled photon pair from two identically decohered pairs, T. Yamamoto, M. Koashi, S. K. Ozdemir, and N. Imoto, Nature 421, 343-346 (2003).

Optimization of evaporative cooling towards a large number of Bose-Einstein-condensed atoms, M. Yamashita, M. Koashi, Tetsuya Mukai, M. Mitsunaga, N. Imoto, and Takaaki Mukai, Phys. Rev. A67, 023601 (2003).

Polarization-entangled W state using parametric down-conversion, T. Yamamoto, K. Tamaki, M. Koashi, and N. Imoto, Phys. Rev. A66, 064301 (2002).

Realization of symmetric sharing of entanglement in semiconductor microcrystallites coupled by a cavity field, Yu-xi Liu, A. Miranowicz, M. Koashi, and N. Imoto, Phys. Rev. A66, 062309 (2002).

Configuration of Separability and Tests for Multipartite Entanglement in Bell-Type Experiments, K. Nagata, M. Koashi, and N. Imoto, Phys. Rev. Lett. 89, 260401 (2002).

Pulse-mode quantum projection synthesis: Effects of mode mismatch on optical state truncation and preparation, S. K. Ozdemir, A. Miranowicz, M. Koashi, and N. Imoto, Phys. Rev. A66, 053809 (2002).

Communication channels analogous to one out of two oblivious transfers based on quantum uncertainty, K. Shimizu and N. Imoto, Phys. Rev. A66, 052316 (2002).

Quantum Information is Incompressible Without Errors, M. Koashi, and N. Imoto, Phys. Rev. Lett. 89, 097904 (2002).

Operations that do not disturb partially known quantum states, M. Koashi and N. Imoto, Phys. Rev. A66, 022318 (2002).

Generation of maximum spin entanglement induced by a cavity field in quantum-dot systems, A. Miranowicz, S. K. Ozdemir, Yu-xi Liu, M. Koashi, N. Imoto, and Y. Hirayama, Phys. Rev. A65, 062321 (2002).

Dynamics of entanglement for coherent excitonic states in a system of two coupled quantum dots and cavity QED, Yu-xi Liu, S. K. Ozdemir, M. Koashi, and N. Imoto, Phys. Rev. A65, 042326 (2002).

Observable suitable for restricting the fidelity to multipartite maximally entangled states, K. Nagata, M. Koashi, and N. Imoto, Phys. Rev. A65, 042314 (2002).

Fault-tolerant simple quantum-bit commitment unbreakable by individual attackes, K. Shimizu and N. Imoto, Phys. Rev. A65, 032324 (2002).

Semiconductor-cavity QED in high-Q regimes: Detuning effect, Yu-xi Liu, N. Imoto, S. K. Ozdemir, Guang-ri Jin, and C. P. Sun, Phys. Rev. A65, 023805 (2002).

Optical qubit generation by state truncation using an experimentally feasible scheme, S. K. Ozdemir, A.~Miranowicz, M. Koashi, and N. Imoto, Journal of Modern Optics, 49, no:5/6, p. 977-984 (2002).

102. Exciton-Photon Interaction for a High-Exciton Quantum Well Placed in a Microcavity, Y. X. Liu, N. Imoto, S. K. Ozdemir, G. R. Jin, C. P. Sun Proceedings of Foundations of Quantum Mechanics in the Light of New Technology ISQM-Tokyo, 2002. 103. Qubit-State Generation Using Projection Synthesis, S. K. Ozdemir, A. Miranowicz, M. Koashi, and N. Imoto, Proceedings of Foundations of Quantum Mechanics In The Light of New Technology: ISQM�\Tokyo, 2002. 104. Quantum Optics in Computing and Communications, S. Liu, G. Guo, H. K. Lo, N. Imoto, Quantum Optics in Computing and Communications 4917, 2002. 105. Effects of mode mismatch on optical state truncation and preparation, S. K. Ozdemir, A. Miranowicz, M. Koashi, and N. Imoto, Physical Review A 66 (5), 53809, 2002.

Quantum-scissors device for optical state truncation: A proposal for practical realization, S. K. Ozdemir, A. Miranowicz, M. Koashi, and N. Imoto, Phys. Rev. A64, 063818 (2001).

Wehrl information entropy and phase distributions of Schrodinger cat and cat-like states, A. Miranowicz, J. Bajer, M. R. B. Wahiddin and N. Imoto, J. Phys. A: Math. Gen. 34, 3887-3896 (2001).

Compressibility of Quantum Mixed-State Signals, M. Koashi and N. Imoto, Phys. Rev. Lett. 87, 017902 (2001).

Concentration and purification scheme for two partially entangled photon pairs, T. Yamamoto, M. Koashi and N. Imoto, Phys. Rev. A64, 012304 (2001).

Quantum-optical states in finite-dimensional Hilbert space. I. State generation, A. Miranowicz, W. Leonski, and N. Imoto, Contemporary Optics and Electronics, M. Evans (Ed.), Advances in Chemical Physics, Vol. 119, J. Wiley and Sons, New York (2001)155.

Probabilistic manipulation of entangled photons, M. Koashi, T. Yamamoto, and N. Imoto, Phys. Rev. A63, 030301(R) (2001).

Single-photon-interference communication equivalent to Bell-state-basis cryptographic quantum communication, K. Shimizu and N. Imoto, Phys. Rev. A62, 054303 (2000).

Multiple observations of quantum clocks, V. Buzek, P. L. Knight, and N. Imoto, Phys. Rev. A62, 062309 (2000).

Entangled webs: Tight bound for symmetric sharing of entanglement, M. Koashi, V. Buzek, and N. Imoto, Phys. Rev. A62, 050302 (2000).

Dynamics of evaporative cooling in magnetically trapped atomic hydrogen, M. Yamashita, M. Koashi, M. Mitsunaga, and N. Imoto, Phys. Rev. A62, 033602 (2000).

Communication channels secured from eavesdropping via transmission of photonic Bell states, K. Shimizu and N. Imoto, Phys. Rev. A60, pp.157-166, (1999).

Observation of an electromagnetically induced grating in cold sodium atoms, M. Mitsunaga and N. Imoto, Phys. Rev. A59, pp.4773-4776, (1999).

Quantum kinetic theory for evaporative cooling of trapped atoms: Growth of Bose-Einstein condensate, M. Yamashita, M. Koashi, and N. Imoto, Phys. Rev. A59, pp.2243-2249, (1999).

Dense coding in photonic quantum communication with enhanced information capacity, K. Shimizu, N. Imoto, and T. Mukai, Phys. Rev. A59, pp.1092-1097, (1999).

Quantum entanglement for secret sharing and secret splitting, A. Karlsson, M. Koashi, and N. Imoto, Phys. Rev. A59, pp.162-168, (1999).

Maximum amount of information obtainable from a single query of a database, M. Koashi and N. Imoto, Phys. Rev. Lett. 81, pp.5233-5236, (1998).

No-cloning theorem of entangled states, M. Koashi and N. Imoto, Phys. Rev. Lett. 81, pp.4264-4267, (1998).

Photonic de-Broglie wave interferometers, S. M. Barnett, N. Imoto, and B. Huttner, Journal of Modern Optics 45, No. 11, pp.2217-2232, (1998).

Photon number squeezing enhanced by multi-photon absorption in microcavity, H. Ezaki, M. Koashi, N. Imoto, and E. Hanamura, Journal of the Physical Society of Japan 67, No. 8, pp.2721-2728, (1998).

Temperature diagnostics for cold sodium atoms by transient four-wave mixing, M. Mitsunaga, M. Yamashita, M. Koashi, and N. Imoto, Opt. Lett. 23, No. 11, pp.840-842, (1998).

Quantum cryptography based on split transmission of one-bit information in two steps, M. Koashi and N. Imoto, Phys. Rev. Lett. 79, p.2383, (1997).

Controlling Two-Level Atoms with a Quantized pi and pi/2 pulses, N. Imoto, in Frontiers in Laser Physics and Spectroscopy (Proceedings of the Todai 1995 International Symposium and 5th ISSP International Symposium, Tokyo, Japan, 1996), ed. S. Watanabe, 33, No. 1-3, Pergamon, 1996, pp.295-301.

Quantum Nondemolition Detection via Successive Back-Action-Evasion Measurements: A Step towards the Experimental Demonstration of Quantum State Reduction, S. R. Friberg, S. Machida, N. Imoto, K. Watanabe, and T. Mukai, in Quantum Coherence and Decoherence (Proceedings of the 5th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology [ISQM-Tokyo '95], Hatoyama, Saitama, Japan, August 21-24, 1995), ed. K. Fujiwara and Y. A. Ono, Elsevier, 1996, ISBN0-444-82219-4, pp.85-88.

Field commutation relations in optical cavities, S.M. Barnett, C. R. Gilson, B. Huttner, and N. Imoto, Phys. Rev. Lett. 77, p.1739, (1996).

Quantum noise in optical beam propagation in distributed amplifiers, M.-G. Kim, N. Imoto, K. Cho and M.-S. Kim, Opt. Commun. 130, p.377, (1996).

Quantum noise in amplification and attenuation, M.-S. Kim, K. Cho, J. Janzky and N. Imoto, Acta Physica Slovaca 46, No. 3, p.1, (1996).

Phase-sensitive reservoir modeled by beam splitters, M.-S. Kim and N. Imoto, Phys. Rev. A52, p.2401, (1995).

Quantum cryptography with coherent states, B. Huttner, N. Imoto, N. Gisin, and T. Mor, Phys. Rev. A51, p.1863, (1995).

Anomalous commutation relation and spontaneous emission inside a microcavity, M. Ueda and N. Imoto, Phys. Rev. A50, p.89, (1994).

Quantum optics of traveling-wave attenuators and amplifiers, J. Jeffers, N. Imoto, and R. Loudon, Phys. Rev. A47, p.3346, (1993).

Continuous quantum-nondemolition measurement of photon number, M. Ueda, N. Imoto, H. Nagaoka, and T. Ogawa, Phys. Rev. A46, p.2859, (1992).

Quantum theory of dynamic interference experiments, N. Hussain, N. Imoto, and R. Loudon, Phys. Rev. A45, p.1987, (1992).

Measurement induced oscillations of a highly squeezed state between super- and sub-Poissonian photon statistics, T. Ogawa, M. Ueda, and N. Imoto, Phys. Rev. Lett. 66, p.1046, (1991).

Generation of the Schroedinger-cat state by continuous photodetection, T. Ogawa, M. Ueda, and N. Imoto, Phys. Rev. A43, p.6458, (1991).

Continuous state reduction of correlated photon fields in photodetection processes, M. Ueda, N. Imoto, and T. Ogawa, Phys. Rev. A41, p.6331, (1990).

Microscopic theory of continuous measurement of photon number, N. Imoto, M. Ueda, and T. Ogawa, Phys. Rev. A41, p.4127, (1990).

Quantum theory for continuous photodetection processes, M. Ueda, N. Imoto, and T. Ogawa, Phys. Rev. A41, p.3891, (1990).

Quantum state controll and nondemolition detection of photons, N. Imoto, in Coherent Optical Communications and Photonic Switching (Proceedings of the Fourth Tirrenia International Workshop on Digital Communications, Tirrenia, Italy, 19-23 Sept. 1989), ed. G. Prati, Elsevier, 1990, ISBN0-444-88412-2, pp.187-202.

Quantum nondemolition measurement of photon number in a lossy optical Kerr medium, N. Imoto and S. Saito, Phys. Rev. A39, p.675, (1989).

A nonlinear optical-fiber interferometer for nondemolitional measurement of photon number, N. Imoto, S. Watkins and Y. Sasaki, Opt. Commun. 61, p.159, (1987).

Realization of number-phase minimum-uncertainty states by quantum nondemolition measurement, M. Kitagawa, N. Imoto, and Y. Yamamoto, Phys. Rev. A35, p.5270, (1987).

Amplitude squeezing in a semiconductor laser using quantum nondemolition measurement and negative feed-back, Y. Yamamoto, N. Imoto, and S. Machida, Phys. Rev. A33, p.3243, (1986).

Internal and external field fluctuations of a laser oscillator: Part I-Quantum mechanical Langevin treatment, Y. Yamamoto and N. Imoto, IEEE J. Quantum Electron. QE-22, p.2032, (1986).

Quantum nondemolition measurement of the photon number via the optical Kerr effect, N. Imoto, H. A. Haus, and Y. Yamamoto, Phys. Rev. A32, No.4, p.2287, (1985).

N. Imoto: "Coupler-type optical grating filters (Analysis)", IEEE J. Lightwave Tech. LT-3, p.895, 1985.

N. Imoto, N. Shimizu, H. Mori, and M. Ikeda: "Sputtered silica waveguides with an embedded three-dimensional structure", IEEE J. Lightwave Tech. LT-1, p.289, 1983.

N. Shimizu, N. Imoto and M. Ikeda: "Fusion splicing between optical circuit and optical fibers", Electron. Lett. 19, p.96, 1983.

N. Imoto and M. Ikeda: "Polarization dispersion measurement in long single-mode fibers with zero dispersion wavelength at 1.5 $\mu$m", IEEE J. Quantum Electron. QE-17, p.542, 1981.

N. Imoto, N. Yoshizawa, J.-I. Sakai and H. Tsuchiya: "Birefringence in sigle-mode optical fiber due to elliptic core deformation and stress anisotropy", IEEE Quantum Electron. QE-16, p.1267, 1980.

N. Imoto, A. Kawana, S. Machida and H. Tsuchiya: "Characteristics of dispersion free single-mode fiber in 1.5$\mu$m wavelength region", IEEE Quantum Electron. QE-16, p.1052, 1980.

A. Kawana, T. Miya, N. Imoto, and H. Tsuchiya: "Pulse broadning in a long-span dispersion-free single-mode fibres at 1.5 $\mu$m", Electron. Lett. 16, p.188, 1980.

A. Sugimura, K. Daikoku, N. Imoto, and T. Miya: "Wavelength dispersion characteristics of single mode fibers in low-loss region", IEEE J. Quantum Electron. QE-16, p.215, 1980.

S. Machida, N. Imoto, and Y. Ohmori: "Multimode fibre baseband frequency response measurement with single frequency output extracted from modulated InGaAsP laser", Electron. Lett. 15, p.607, 1979.

H. Tsuchiya and N. Imoto: "Dispersion-free single-mode fiber in 1.5 $\mu$m wavelength region", Electron. Lett. 15, p.476, 1979.

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