Publication
Book
    "Cold atom magnetometers" in Principles and Methods of Quantum Information Technologies
    Yujiro Eto, Mark Sadgrove, and Takuya Hirano
    Lecture Notes in Physics, vol. 911, pp 111-133.
    Y. Yamamoto and K. Semba eds., Springer.


Journal paper
  1. "Efficient conversion and deformation of pulse shape in second harmonic generation using quasi-phase-matched waveguide"
    Yujiro Eto and Takuya Hirano,
    In preparation

  2. "Faraday patterns generated by Rabi oscillation in a binary Bose-Einstein condensate"
    Terun Chen, Kosuke Shibata, Yujiro Eto, Takuya Hirano, and Hiroki Saito
    arXiv: 1907.03945.

  3. "Pulse-resolved measurement of contiunous-variable Einstein-Podolsky-Rosen entanglement with shaped local oscillators"
    Ami Shinjo, Yujiro Eto, and Takuya Hirano,
    Optics Express 27, 17610-17619 (2019) doi: https://doi.org/10.1364/OE.27.017610.

  4. "Dissipation-assisted coherence formation in a spinor quantum gas"
    Yujiro Eto, Hitoshi Shibayama, Kosuke Shibata, Aki Torii, Keita Nabeta, Hiroki Saito, and Takuya Hirano,
    Physical Review Letters 122, 245301/1-5 (2019) doi: https://doi.org/10.1103/PhysRevLett.122.245301.

  5. "Interaction modulation in a long-lived Bose-Einstein condensate by rf coupling"
    Kosuke Shibata, Aki Torii, Hitoshi Shibayama, Yujiro Eto, Hiroki Saito, and Takuya Hirano,
    Physical Review A 99, 013622/1-7 (2019) doi: https://doi.org/10.1103/PhysRevA.99.013622.

  6. "Ground-state phases of a mixture of spin-1 and spin-2 Bose-Einstein condensates"
    Naoki Irikura, Yujiro Eto, Takuya Hirano, and Hiroki Saito
    Physical Review A 97, 023622/1-10 (2018) doi: https://doi.org/10.1103/PhysRevA.97.023622.
    PRA Kaleidoscope

  7. "Spinor dynamics in a mixture of spin-1 and spin-2 Bose-Einstein condensates"
    Yujiro Eto, Hitoshi Shibayama, Hiroki Saito, and Takuya Hirano,
    Physical Review A 97, 021602(R)/1-5 (2018) doi: https://doi.org/10.1103/PhysRevA.97.021602.

  8. "Nonequilibrium dynamics induced by miscible-immiscible transition in binary Bose-Einstein condensates"
    Yujiro Eto, Masahiro Takahashi, Masaya Kunimi, Hiroki Saito, and Takuya Hirano,
    New Journal of Physics 18, 073029/1-6 (2016) doi:10.1088/1367-2630/18/7/073029.

    Corrigendum: New Journal of Physics 20, 019501 (2018)

  9. "Bouncing motion and penetration dynamics in multicomponent Bose-Einstein condensates"
    Yujiro Eto, Masahiro Takahashi, Keita Nabeta, Ryotaro Okada, Masaya Kunimi, Hiroki Saito, and Takuya Hirano,
    Physical Review A 93, 033615/1-6 (2016) doi: http://dx.doi.org/10.1103/PhysRevA.93.033615.

    "Bose-Einstein condensates miscibility properties reveal surprises", UEC e-Bulletin, June 2016 Issue, Phys. org, June 27 2016,

    Erratum: Physical Review A 96, 069904(E) (2017)

  10. "Experimental realization of a spatially separated entanglement with continuous variable using laser pulse trains"
    Yun Zhang, Ryuhi Okubo, Mayumi Hirano, Yujiro Eto, and Takuya Hirano,
    Scientific Reports 5, 13029/1-8 (2015) doi:10.1038/srep13029.

  11. "Suppression of relative flow by multiple domains in two component Bose-Einstein condensates"
    Yujiro Eto, Masaya Kunimi, Hidekatsu Tokita, Hiroki Saito, and Takuya Hirano,
    Physical Review A 92, 013611/1-5 (2015) doi: http://dx.doi.org/10.1103/PhysRevA.92.013611.

  12. "Control of spin current in a Bose gas by periodic application of π pulses"
    Yujiro Eto, Mark Sadgrove, Sho Hasegawa, Hiroki Saito, and Takuya Hirano,
    Physical Review A 90, 013626/1-6 (2014) doi: http://dx.doi.org/10.1103/PhysRevA.90.013626.

  13. "Observation of dipole-induced spin texture in an 87Rb spin-2 Bose-Einstein condensate"
    Yujiro Eto, Hiroki Saito, and Takuya Hirano,
    Physical Review Letters 112, 185301/1-5 (2014) doi: 10.1103/PhysRevLett.112.185301.

  14. "Ultrabroadband direct detection of nonclassical photon statistics at telecom wavelength"
    Kentaro Wakui, Yujiro Eto, Hugo Benichi, Tetsufumi Yanagida, Shuro Izumi, Kazuhiro Ema, Takayuki Numata, Daiji Fukuda, Masahiro Takeoka, and Masahide Sasaki,
    Scientific Reports 4, 4535/1-7 (2014) doi:10.1038/srep04535.

  15. "Spin-echo-based magnetometry with spinor Bose-Einstein condensates"
    Yujiro Eto, Hayato Ikeda, Hirosuke Suzuki, Sho Hasegawa, Yasushi Tomiyama, Sawako Sekine, Mark Sadgrove, and Takuya Hirano,
    Physical Review A 88, 031602(R)/1-4 (2013) doi: http://dx.doi.org/10.1103/PhysRevA.88.031602.

  16. "Ramsey interferometer using the Zeeman sublevels in a spin-2 Bose gas"
    Mark Sadgrove, Yujiro Eto, Sawako Sekine, Hirosuke Suzuki and Takuya Hirano,
    Journal of the Physical Society of Japan 82, 094002/1-6 (2013) doi: http://dx.doi.org/10.7566/JPSJ.82.094002.

  17. "Quantum tele-amplification with a continuous variable superposition state"
    Jonas S. Neergaard-Nielsen, Yujiro Eto, Chang-Woo Lee, Hyunseok Jeong, and Masahide Sasaki,
    Nature Photonics 7, 439-443 (2013) doi:10.1038/nphoton.2013.101.

  18. "Control and detection of the Larmor precession of F = 2 87Rb Bose-Einstein condensates by Ramsey interferometry and spin-echo"
    Yujiro Eto, Sawako Sekine, Sho Hasegawa, Mark Sadgrove, Hiroki Saito, and Takuya Hirano,
    Applied Physics Express 6, 052801/1-4 (2013) doi:10.7567/APEX.6.052801.

  19. "Temporal characteristics of pulsed squeezing in a nonlinear optical waveguide"
    Yujiro Eto, Akane Koshio, Akito Ohshiro, Yun Zhang, Masahide Sasaki, and Takuya Hirano,
    Japanese Journal of Applied Physics 52, 048001/1-2 (2013) doi:10.7567/JJAP.52.048001.

  20. "Efficient homodyne measurement of picosecond squeezed pulses with pulse shaping technique"
    Yujiro Eto, Akane Koshio, Akito Ohshiro, Junichi Sakurai, Keiko Horie, Takuya Hirano, and　Masahide Sasaki,
    Optics Letters 36, 4653-4655 (2011) doi: http://dx.doi.org/10.1364/OL.36.004653.

  21. "Quantum-state tomography of a single nuclear spin qubit of an optically manipulated ytterbium atom"
    Atushi Noguchi, Yujiro Eto, Masahito Ueda, and Mikio Kozuma,
    Physical Review A 84, 030301(R)/1-4 (2011) doi: http://dx.doi.org/10.1103/PhysRevA.84.030301.

  22. "Projective measurement of a single nuclear spin qubit by using two-mode cavity QED"
    Yujiro Eto, Atsushi Noguchi, Peng Zhang, Masahito Ueda, and Mikio Kozuma,
    Physical Review Letters 106, 160501/1-4 (2011) doi: http://dx.doi.org/10.1103/PhysRevLett.106.160501.

  23. "Transporting continuous quantum variables of individual light pulses"
    Yujiro Eto, Yun Zhang, and Takuya Hirano,
    Optics Express 19, 1360-1366 (2011) doi: http://dx.doi.org/10.1364/OE.19.001360.

  24. "Faraday rotation with a single-nuclear-spin qubit in a high-finesse optical cavity"
    Nobuyuki Takei, Makoto Takeuchi, Yujiro Eto, Atsushi Noguchi, Peng Zhang, Masahito Ueda, and Mikio Kozuma,
    Physical Review A 81, 042331/1-6 (2010) doi: http://dx.doi.org/10.1103/PhysRevA.81.042331.

  25. "Stable generation of quadrature entanglement using a ring interferometer"
    Yujiro Eto, Akihiro Nonaka, Yun Zhang, and Takuya Hirano,
    Physical Review A 79, 050302(R)/1-4 (2009) doi: http://dx.doi.org/10.1103/PhysRevA.79.050302.

  26. "Observation of quadrature squeezing in a χ(2) nonlinear waveguide using a temporally shaped local oscillator pulse"
    Yujiro Eto, Takashi Tajima, Yun Zhang, and Takuya Hirano,
    Optics Express 16, 10650-10657 (2008) doi: http://dx.doi.org/10.1364/OE.16.010650.

  27. "Observation of squeezed light at 1.535 μm using a pulsed homodyne detector"
    Yujiro Eto, Takashi Tajima, Yun Zhang, and Takuya Hirano,
    Optics Letters 32, 1698-1700 (2007) doi: http://dx.doi.org/10.1364/OL.32.001698.

  28. "Pulsed homodyne detection of squeezed light at telecommunication wavelength"
    Yujiro Eto, Takashi Tajima, Yun Zhang, and Takuya Hirano,
    Japanese Journal of Applied Physics 45, L821-L823 (2006) doi:10.1143/JJAP.45.L821.



Proceedings
  1. "Generation of physical random numbers by using homodyne detection "
    Kodai Hirakawa, Shota Oya, Yusuke Oguri, Tsubasa Ichikawa, Yujiro Eto, Takuya Hirano, Toyohiro Tsurumaru,
    Proceedings of 8th International conference on Quantum Communication, Measurement, and Computation,
    Proc. SPIE 9996, Quantum Information Science and Technology II, 99960I (October 24, 2016) doi:10.1117/12.2241362 .
    Edited by Mark T. Gruneisen, Miloslav Dusek, and John G. Rarity.

  2. "Observation of strong continuous-variable Einstein-Podolsky-Rosen entanglement using shaped local oscillators"
    Ami Shinjo, Naoyuki Hashiyama, Akane Koshio, Yujiro Eto, Takuya Hirano,
    Proceedings of 8th International conference on Quantum Communication, Measurement, and Computation,
    Proc. SPIE 9996, Quantum Information Science and Technology II, 99960I (October 24, 2016) doi:10.1117/12.2241297.
    Edited by Mark T. Gruneisen, Miloslav Dusek, and John G. Rarity.

  3. "Ultrabroadband, direct detection of nonclassical photon statistics in parametric fluorescence at telecom wavelength"
    K. Wakui, Y. Eto, T. Yanagida, H. Benichi, S. Izumi, K. Ema, T. Numata, D. Fukuda, M. Sasaki,
    Proceedings of 2013 Conference on Lasers and Electro-Optics (Cleo),
    IEEE 14392773 (June 16, 2014) doi:10.1364/CLEO_QELS.2013.QM4L.4.

  4. "Pulsed homodyne detection of quadrature entanglement at telecommunication wavelength"
    Yujiro Eto, Akihiro Nonaka, Yun Zhang, and Takuya Hirano,
    Proceedings of 8th International conference on Quantum Communication, Measurement, and Computation,
    AIP conference proceedings 1110, 181-184 (2009) doi: http://dx.doi.org/10.1063/1.3131302.
    Edited by A. Lvovsky.

  5. "Measurement of 3 dB squeezing at telecommunication wavelength using pulsed homodyne detector"
    Yujiro Eto, Takashi Tajima, Yun Zhang, and Takuya Hirano,
    Proceedings of 8th International conference on Quantum Communication, Measurement, and Computation,
    NICT Press, pp.23-26 (2007).
    Edited by O. Hirota, J. H. Shapiro, and M. Sasaki.



解説記事等
  1. -最近の研究から-「微弱な磁気双極子相互作用によるボース・アインシュタイン凝縮体スピンの空間構造形成：磁性気体としての冷却Rb原子」
    衞藤雄二郎, 斎藤弘樹, 平野琢也
    日本物理学会誌, 70, 614-619 (2015) PDF.

  2. -私はこうして物理を選んでしまった-"Over the Rainbow"
    衛藤雄二郎
    パリティー 2015年8月号, 45頁, 丸善出版株式会社.

  3. -物理科学この1年-「磁気双極子相互作用によるRbボース・アインシュタイン凝縮体スピンの空間構造形成」
    平野琢也, 衛藤雄二郎
    パリティー 2015年1月号, 6-7頁, 丸善出版株式会社.

  4. -研究紹介-「ボース・アインシュタイン凝縮体を用いた磁力計」
    衞藤雄二郎, 平野琢也
    応用物理 82, 769-772 (2013).

  5. -クローズアップ研究者-「パルス光の量子雑音制御と量子通信技術の実用化に向けて」
    衛藤雄二郎,
    関西先端研究センター広報詩KARC FRONT 21, 14-15 (2011).