Publications

2024

  1. Black Box Work Extraction and Composite Hypothesis Testing
    Kaito Watanabe ,  and  Ryuji Takagi
    Physical Review Letters 133: 250401. Dec 2024
    URL arXiv PRESS RELEASE
  2. Classical simulation of circuits with realistic Gottesman-Kitaev-Preskill states
    Cameron Calcluth ,  Oliver Hahn ,  Juani Bermejo-Vega ,  Alessandro Ferraro ,  and  Giulia Ferrini
    arXiv : 2412.13136. Dec 2024
    arXiv
  3. Quantum geometric tensor determines the i.i.d. conversion rate in the resource theory of asymmetry for any compact Lie group
    Koji Yamaguchi ,  Yosuke Mitsuhashi ,  and  Hiroyasu Tajima
    arXiv : 2411.04766. Nov 2024
    arXiv
  4. More global randomness from less random local gates
    Ryotaro Suzuki ,  Hosho Katsura ,  Yosuke Mitsuhashi ,  Tomohiro Soejima ,  Jens Eisert ,  and  Nobuyuki Yoshioka
    arXiv : 2410.24127. Oct 2024
    arXiv
  5. Mixed-state additivity properties of magic monotones based on quantum relative entropies for single-qubit states and beyond
    Roberto Rubboli ,  Ryuji Takagi ,  and  Marco Tomamichel
    Quantum 8: 1492. Oct 2024
    URL arXiv
  6. Assessing non-Gaussian quantum state conversion with the stellar rank
    Oliver Hahn ,  Giulia Ferrini ,  Alessandro Ferraro ,  and  Ulysse Chabaud
    arXiv : 2410.23721. Oct 2024
    arXiv
  7. Characterization of Randomness in Quantum Circuits of Continuous Gate Sets
    Yosuke Mitsuhashi ,  Ryotaro Suzuki ,  Tomohiro Soejima ,  and  Nobuyuki Yoshioka
    arXiv : 2408.13475. Aug 2024
    arXiv
  8. Unitary Designs of Symmetric Local Random Circuits
    Yosuke Mitsuhashi ,  Ryotaro Suzuki ,  Tomohiro Soejima ,  and  Nobuyuki Yoshioka
    arXiv : 2408.13472. Aug 2024
    arXiv
  9. Bridging magic and non-Gaussian resources via Gottesman-Kitaev-Preskill encoding
    Oliver Hahn ,  Giulia Ferrini ,  and  Ryuji Takagi
    arXiv : 2406.06418. Jun 2024
    arXiv
  10. When quantum memory is useful for dense coding
    Ryuji Takagi ,  and  Masahito Hayashi
    Letters in Mathematical Physics 114: 88. Jun 2024
    URL arXiv
  11. Arbitrary Amplification of Quantum Coherence in Asymptotic and Catalytic Transformation
    Naoto Shiraishi ,  and  Ryuji Takagi
    Physical Review Letters 132: 180202. May 2024
    URL arXiv PRESS RELEASE
  12. Symmetric Clifford twirling for cost-optimal quantum error mitigation in early FTQC regime
    Kento Tsubouchi ,  Yosuke Mitsuhashi ,  Kunal Sharma ,  and  Nobuyuki Yoshioka
    arXiv : 2405.07720. May 2024
    arXiv
  13. Explicit decoders using fixed-point amplitude amplification based on QSVT
    Takeru Utsumi ,  and  Yoshifumi Nakata
    arXiv : 2405.06051. May 2024
    arXiv
  14. Classical simulation and quantum resource theory of non-Gaussian optics
    Oliver Hahn ,  Ryuji Takagi ,  Giulia Ferrini ,  and  Hayata Yamasaki
    arXiv : 2404.07115. Apr 2024
    arXiv
  15. Gibbs-preserving operations requiring infinite amount of quantum coherence
    Hiroyasu Tajima* ,  and  Ryuji Takagi*
    arXiv : 2404.03479. Apr 2024
    arXiv
  16. Robustness- and weight-based resource measures without convexity restriction: Multicopy witness and operational advantage in static and dynamical quantum resource theories
    Kohdai Kuroiwa ,  Ryuji Takagi ,  Gerardo Adesso ,  and  Hayata Yamasaki
    Physical Review A 109: 042403. Apr 2024
    URL arXiv
  17. Every Quantum Helps: Operational Advantage of Quantum Resources beyond Convexity
    Kohdai Kuroiwa ,  Ryuji Takagi ,  Gerardo Adesso ,  and  Hayata Yamasaki
    Physical Review Letters 132: 150201. Apr 2024
    URL arXiv
  18. Quantum Dynamic Programming
    Jeongrak Son ,  Marek Gluza ,  Ryuji Takagi ,  and  Nelly H. Y. Ng
    arXiv : 2403.09187. Mar 2024
    arXiv
  19. Virtual quantum resource distillation: General framework and applications
    Ryuji Takagi ,  Xiao Yuan ,  Bartosz Regula ,  and  Mile Gu
    Physical Review A 109: 022403. Feb 2024
    URL arXiv
  20. Virtual Quantum Resource Distillation
    Xiao Yuan ,  Bartosz Regula ,  Ryuji Takagi ,  and  Mile Gu
    Physical Review Letters 132: 022403. Feb 2024
    URL arXiv

2023

  1. Universal Sampling Lower Bounds for Quantum Error Mitigation
    Ryuji Takagi ,  Hiroyasu Tajima ,  and  Mile Gu
    Physical Review Letters 131: 022403. Nov 2023
    URL arXiv PRESS RELEASE

2022

  1. Fundamental limits of quantum error mitigation
    Ryuji Takagi ,  Suguru Endo ,  Shintaro Minagawa ,  and  Mile Gu
    npj Quantum Information 8: 114. Sep 2022
    URL arXiv
  2. Universal trade-off structure between symmetry, irreversibility, and quantum coherence in quantum processes
    Hiroyasu Tajima ,  Ryuji Takagi ,  and  Yui Kuramochi
    arXiv : 2206.11086. Jun 2022
    URL arXiv
  3. Correlation in Catalysts Enables Arbitrary Manipulation of Quantum Coherence
    Ryuji Takagi ,  and  Naoto Shiraishi
    Physical Review Letters 128: 2206.11086. Jun 2022
    URL arXiv
  4. One-Shot Yield-Cost Relations in General Quantum Resource Theories
    Ryuji Takagi ,  Bartosz Regula ,  and  Mark M. Wilde
    PRX Quantum 3: 2206.11086. Mar 2022
    URL arXiv

2021

  1. Optimal resource cost for error mitigation
    Ryuji Takagi
    Physical Review Research 3: 2206.11086. Aug 2021
    URL arXiv
  2. Operational applications of the diamond norm and related measures in quantifying the non-physicality of quantum maps
    Bartosz Regula ,  Ryuji Takagi ,  and  Mile Gu
    Quantum 5: 522. Aug 2021
    URL arXiv
  3. One-Shot Manipulation of Dynamical Quantum Resources
    Bartosz Regula* ,  and  Ryuji Takagi*
    Physical Review Letters 127: 522. Aug 2021
    URL arXiv
  4. Fundamental limitations on distillation of quantum channel resources
    Bartosz Regula ,  and  Ryuji Takagi
    Nature Communications 12: 522. Jul 2021
    URL arXiv
  5. Enhancing quantum models of stochastic processes with error mitigation
    Matthew Ho ,  Ryuji Takagi ,  and  Mile Gu
    arXiv : 2105.06448. Jul 2021
    arXiv
  6. Framework for resource quantification in infinite-dimensional general probabilistic theories
    Ludovico Lami ,  Bartosz Regula ,  Ryuji Takagi ,  and  Giovanni Ferrari
    Physical Review A 103: 2105.06448. Mar 2021
    URL arXiv
  7. Operational Quantification of Continuous-Variable Quantum Resources
    Bartosz Regula ,  Ludovico Lami ,  Giovanni Ferrari ,  and  Ryuji Takagi
    Physical Review Letters 126: 2105.06448. Mar 2021
    URL arXiv

2020

  1. Benchmarking one-shot distillation in general quantum resource theories
    Bartosz Regula ,  Kaifeng Bu ,  Ryuji Takagi ,  and  Zi-Wen Liu
    Physical Review A 101: 2105.06448. Jun 2020
    URL arXiv
  2. Assisted concentration of Gaussian resources
    Ludovico Lami ,  Ryuji Takagi ,  and  Gerardo Adesso
    Physical Review A 101: 2105.06448. May 2020
    URL arXiv
  3. Application of the Resource Theory of Channels to Communication Scenarios
    Ryuji Takagi ,  Kun Wang ,  and  Masahito Hayashi
    Physical Review Letters 124: 2105.06448. Mar 2020
    URL arXiv
  4. Universal limitations on implementing resourceful unitary evolutions
    Ryuji Takagi ,  and  Hiroyasu Tajima
    Physical Review A 101: 2105.06448. Feb 2020
    URL arXiv

2019

  1. Skew informations from an operational view via resource theory of asymmetry
    Ryuji Takagi
    Scientific Reports 9: 2105.06448. Oct 2019
    URL arXiv
  2. General Resource Theories in Quantum Mechanics and Beyond: Operational Characterization via Discrimination Tasks
    Ryuji Takagi ,  and  Bartosz Regula
    Physical Review X 9: 2105.06448. Sep 2019
    URL arXiv
  3. One-Shot Operational Quantum Resource Theory
    Zi-Wen Liu ,  Kaifeng Bu ,  and  Ryuji Takagi
    Physical Review Letters 123: 2105.06448. Jul 2019
    URL arXiv
  4. Operational Advantage of Quantum Resources in Subchannel Discrimination
    Ryuji Takagi ,  Bartosz Regula ,  Kaifeng Bu ,  Zi-Wen Liu ,  and  Gerardo Adesso
    Physical Review Letters 122: 2105.06448. Apr 2019
    URL arXiv
  5. Diagonal quantum discord
    Zi-Wen Liu ,  Ryuji Takagi ,  and  Seth Lloyd
    Journal of Physics A: Mathematical and Theoretical 52: 135301. Mar 2019
    URL arXiv
  6. Activation and superactivation of single-mode Gaussian quantum channels
    Youngrong Lim ,  Ryuji Takagi ,  Gerardo Adesso ,  and  Soojoon Lee
    Physical Review A 99: 135301. Mar 2019
    URL arXiv
  7. State Exchange with Quantum Side Information
    Yonghae Lee ,  Ryuji Takagi ,  Hayata Yamasaki ,  Gerardo Adesso ,  and  Soojoon Lee
    Physical Review Letters 122: 135301. Jan 2019
    URL arXiv

2018

  1. Convex resource theory of non-Gaussianity
    Ryuji Takagi ,  and  Quntao Zhuang
    Physical Review A 97: 135301. Jun 2018
    URL arXiv

2017

  1. Error rates and resource overheads of encoded three-qubit gates
    Ryuji Takagi ,  Theodore J. Yoder ,  and  Isaac L. Chuang
    Physical Review A 96: 135301. Oct 2017
    URL arXiv

2016

  1. Universal Fault-Tolerant Gates on Concatenated Stabilizer Codes
    Theodore J. Yoder ,  Ryuji Takagi ,  and  Isaac L. Chuang
    Physical Review X 6: 135301. Sep 2016
    URL arXiv