White Paper

  • Shota Nagayama, Rikizo Ikuta, Hideo Kosaka, Toshihiko Sasaki, Hiroki Takahashi, Kae Nemoto, Tomoyuki Horikiri, Rekishu Yamazaki, Takashi Yamamoto and Rodney Van Meter. The Quantum Internet - the ultimate cyberspace in the universe -. Feb. 2021. LINK in Japanese.

Journal Papers

Published

  • Takahiko Satoh, Shota Nagayama, Shigeya Suzuki, Takaaki Matsuo and Rodney Van Meter. Attacking the Quantum Internet. IEEE Transaction on Quantum Engineering 2: 4102617, Jul 2021
  • Kenji Kubo, Yuya Nakagawa, Suguru Endo, Shota Nagayama. Variational quantum simulations of stochastic differential equations. Physical Review A 103 (5), 052425. May 2021.
  • Takaaki Matsuo, Takahiko Satoh, Shota Nagayama and Rodney Van Meter. Analysis of Measurement-based Quantum Network Coding over Repeater Networks under Noisy Conditions. Phys. Rev. A, 97:062328, Jun 2018.
  • Takahiko Satoh, Shota Nagayama, and Rodney Van Meter. The Network Impact of Hijacking a Quantum Repeater. Quantum Science and Technology 3 (3), 034008, May 2018.
  • S. Nagayama, A. G. Fowler, D. Horsman, S. J. Devitt, and R. Van Meter. Surface code error correction on a defective lattice. New Journal of Physics, 19(2):023050, 2017.
  • S. Nagayama, T. Satoh, and R. Van Meter. State injection, lattice surgery, and dense packing of the deformation-based surface code. Phys. Rev. A, 95:012321, Jan 2017.
  • S. Nagayama, B.-S. Choi, S. Devitt, S. Suzuki, and R. Van Meter. Interoperability in encoded quantum repeater networks. Phys. Rev. A, 93:042338, Apr 2016.
  • Takahiko Satoh, Kaori Ishizaki, Shota Nagayama and Rodney Van Meter. Analysis of quantum network coding for realistic repeater networks. Physical Review A, 93:032302. Mar. 2016.

Pre-prints

  • Rodney Van Meter, Takahiko Satoh, Shota Nagayama, Takaaki Matsuo and Shigeya Suzuki. Optimizing Timing of High-Success-Probability Quantum Repeaters. arXiv:1701.04586, Jan. 2017.

Theses

  • Shota Nagayama. Doctoral dissertation, Distributed Quantum Computing Utilizing Multiple Codes on Imperfect Hardware. arXiv:1704.02620, Feb. 2017.
  • Shota Nagayama. Master’s thesis, Surface code quantum computation on a defective physical lattice. Feb. 2012.
  • Shota Nagayama. Bachelor’s thesis, 量子鍵配送を利用したIPsecのためのIKE拡張.
    http://www.sfc.wide.ad.jp/thesis/2009/bachelor/kurosagi-bachelor-thesis.pdf (in Japanese).
    English title: Modifying IKE for IPsec with Quantum Key Distribution. Feb. 2010.

Internet Drafts


Oral Presentations

International Conferences

National Conferences and Workshops

Invited Talk (Academic Conferences)

Invited Talk (other Conferences)

Research Presentation


Poster Presentations

International Conferences

  • Kenji Kubo, Yuya O. Nakagawa, Suguru Endo, and Shota Nagayama. Variational quantum simulations of stochastic differential equations. Asian Conference on Quantum Information Science 2021, Online Japan, Sep 2021.
  • Shota Nagayama, Takahiko Satoh, Kenji Kubo. Fundamental scheme to descrive scenarios in extensive-form games by Quantum Annealing. Asian Conference on Quantum Information Science 2019, Korea Institute of Advanced Study. Korea, Aug 2019.
  • Shota Nagayama, Zhikuan Zhao, Takahiko Satoh. Conditions Which Determine Quantum Network Coding Useful in the Butterfly Network. Asian Conference on Quantum Information Science 2018, Nagoya Univ. Japan, Sep 2018.
  • Shota Nagayama, Shigeya Suzuki, Takahiko Satoh, Takaaki Matsuo and Rodney Van Meter. Analysis of Scalable quantum router architecture with code interoperability. 2nd Workshop for Quantum Repeaters and Networks, Austria, Sep. 2017.
  • Shota Nagayama, Shigeya Suzuki, Takahiko Satoh, Takaaki Matsuo and Rodney Van Meter. Scalable quantum router architecture with code interoperability. QCMC2016, Singapore, Jul. 2016.
  • Takaaki Matsuo, Takahiko Satoh, Shota Nagayama, Shigeya Suzuki and Rodney Van Meter. Wide-area topology of a Quantum Internet. QCMC2016, Singapore, Jul. 2016.
  • Rodney Van Meter, Shigeya Suzuki, Shota Nagayama, Takahiko Satoh, Takaaki Matsuo, Amin Taherkhani, Simon Devitt and Joe Touch. Large-Scale Simulation of the Quantum Internet. QCMC2016, Singapore, Jul. 2016.
  • Takahiko Satoh, Shigeya Suzuki, Shota Nagayama, Takaaki Matsuo and Rodney Van Meter. Routing on a Quantum Internet. QCMC2016, Singapore, Jul. 2016.
  • Shigeya Suzuki, Rodney Van Meter, Shota Nagayama, Takahiko Satoh and Takaaki Matsuo. Architecture of software simulation of a Quantum Internet. QCMC2016, Singapore, Jul. 2016.
  • Shota Nagayama, Byung-Soo Choi, Simon Devitt, Shigeya Suzuki, Rodney Van Meter. Error and resource estimation of generalized heterogeneous coded Bell pairs. Workshop for Quantum Repeaters and Networks Monterey, USA, 2015.
  • Shota Nagayama, Clare Horsman, Austin Fowler and Rodney Van Meter. Surface Code Quantum Computation on a Defective Physical Lattice. Quantum Error Correction 2011, Los Angeles, USA, Dec 2011.
  • Shota Nagayama and Rodney Van Meter. Defective Qubits in Surface Code Quantum Computation on a Fixed Lattice. Asian Conference on Quantum Information Science 2010, Tokyo Univ. Japan, Aug 2010.
  • Shota Nagayama and Rodney Van Meter. RaQoon2: Extension of Internet Key Exchange to Use Quantum Key Distribution. Updating Quantum Cryptography and Communications 2010 Japan, Nov 2010.
  • Takahiko Satoh, Shota Nagayama and Rodney Van Meter. A reversible ternary adder for quantum computation. Asian Conference on Quantum Information Science 2010, Tokyo Univ. Japan, Aug 2007.

National Conferences and Workshops

  • Kenji Kubo, Shota Nagayama. Applicability and Challenges of NISQ algorithm to Financial Derivative. The 41st Quantum Information Technology Symposium (QIT41). Tokyo, Japan. Nov. 2019.
  • Takayuki Suzuki, Shota Nagayama. Analysis on Quantum Annealing Based on Quantum Master Equation. The 41st Quantum Information Technology Symposium (QIT41). Tokyo, Japan. Nov. 2019.
  • Kanto, Teranishi, Shota Nagayama. Quantum Annealing for Minimum Cut of a Simple Graph. The 41st Quantum Information Technology Symposium (QIT41). Tokyo, Japan. Nov. 2019.
  • Shota Nagayama, Clare Horsman, Austin Fowler and Rodney Van Meter. Surface code quantum computation on a defective lattice. FIRST Project Summer School, Okinawa, Japan. Jul. 2012.
  • Shota Nagayama, Clare Horsman, Austin Fowler, and Rodney Van Meter. Surface code quantum computation on a defective lattice. FIRST All-Hands Meeting, Dec. 2011.
  • Shota Nagayama and Rodney Van Meter. Defective Qubits in Surface Code Quantum Computation on a Fixed Lattice. FIRST Project Summer School, Okinawa, Japan. Aug. 2010.
  • Shota Nagayama and Rodney Van Meter. Defective Qubits in Surface Code Quantum Computation on a Fixed Lattice. FIRST All-hands meeting, Kyoto, Japan. Dec. 2010.

Committee and Working Group Reports

  • Rodney Van Meter and Shota Nagayama for the WIDE AQUA group members, AQUA: Advancing Quantum Architecture Annual Report 2010
    WIDE Project working group report. Brief intro into “Why quantum?” and a snapshot of work going on not just at SFC but in the WIDE Project at large. Dec. 2010.

Tutorials and Seminars

  • Shota Nagayama. Surface Code Quantum Computation. National Institute of Advanced Industrial Science and Technology(AIST) Nanoelectronics Research Institute. October 10th, 2019.
  • Shota Nagayama. Fault-tolerant quantum computation and Quantum communication QCX2. August 7th, 2019.
  • FIRST/Quantum Cybernetics/CREST Joint 1.5-day Surface Code Quantum Error Correction Tutorial/Workshop. Feb. 23-24, 2011. Videos on SOI website

Hackathon Activities

  • Shota Nagayama, Shigeya Suzuki, Hirotaka Nakajima. “Quantum Ping” and Hackathon report. QIRG, IRTF104. Prague, Czech Republic. Mar 2019.
  • Shota Nagayama, Hirotaka Nakajima.Quantum Digital Signature: “Hanko”. Quantum Internet Hackathon 2018, Amsterdam, Netherland. Oct 2018.

Other Presentations

  • Heterogeneously encoded Bell pairs. Ritsumeikan University, Shiga, Japan. Jul. 2015.
  • Surface Code Quantum Computation on a Defective Physical Lattice. Georgia Institute of Technology. Feb. 2013.
  • Surface Code Quantum Computation on a Defective Physical Lattice. Kyoto. Jan. 2013.
  • Shota Nagayama, “Surface Code Quantum Computation on a Defective Physical Lattice”, Microsoft Research, February 15, 2012.
  • Surface code on defective lattice, The University of Melbourne. Apr. 2011.
  • IPsec with QKD, WIDE Camp Spring 2009. Mar. 2009.

Patents

Holds three patents in quantum information technology.