Bartosz Reguła

Bartosz Regula

I lead the Mathematical Quantum Information research group at RIKEN's Center for Quantum Computing.

My interests lie in the mathematical characterisation of quantum resources, the convex optimisation problems involved in their quantification, and their applications in quantum information theory.

  • 2023–
    RIKEN Hakubi Team Leader
    RIKEN Center for Quantum Computing, Japan
  • 2021–2023
    JSPS Postdoctoral Fellow
    University of Tokyo, Japan
  • 2019–2021
    Presidential Postdoctoral Fellow
    Nanyang Technological University, Singapore
  • 2018
    PhD Mathematics
    University of Nottingham, UK
    (supervisor: Gerardo Adesso)

Recent news and publications

  1. New preprint: we show how our recent technical improvements in quantum randomness extraction can translate to some of the best bounds on finite-size key rates achievable in practical QKD. Making the most of leftovers: Improved privacy amplification for quantum key distribution
    Matthew Simon Tan, Bartosz Regula and Marco Tomamichel
    arXiv:2609.38306
    arXivpdf

  2. Together with Ryuji Takagi, I organised the workshop Quantum Resources in Tokyo (16–20 March 2026).

  3. New preprint: we improve on known bounds for quantum randomness extraction by reconsidering from scratch how smooth Rényi entropies should be defined. Rethinking quantum smooth entropies: Tight one-shot analysis of quantum privacy amplification
    Bartosz Regula and Marco Tomamichel
    arXiv:2603.04493
    Presented at QCrypt 2026, Beyond IID 2026, and AQIS 2026 (long talk)arXivpdf

  4. New publication: we show that changing the figure of merit in entanglement distillation can significantly simplify the evaluation of its asymptotic performance. This is made possible by new developments in composite hypothesis testing. Asymptotic quantification of entanglement with a single copy
    Ludovico Lami, Mario Berta, and Bartosz Regula
    Nature Physics 22, 439–445 (2026)
    Featured as a plenary talk at QIP 2025arXivpdfjournal pdf

  5. New preprint: we show how fundamental bounds in quantum hypothesis testing can be surpassed by tolerating just a little bit of inconclusiveness. Beyond Hoeffding and Chernoff: Trading conclusiveness for advantages in quantum hypothesis testing
    Kaiyuan Ji and Bartosz Regula
    arXiv:2510.07601
    Presented at AQIS 2026arXivpdf

  6. I have been awarded a JST PRESTO grant from the Japan Science and Technology Agency to work on the applications of information-theoretic techniques in the study of the limits of classical and quantum information processing.

  7. Tight relations and equivalences between smooth relative entropies
    Bartosz Regula, Ludovico Lami, and Nilanjana Datta
    IEEE Transactions on Information Theory 72, 3051–3073 (2026)
    Presented at QIP 2026arXivpdf

  8. I have been appointed as an Associate Editor of PRX Quantum.

  9. I gave an invited plenary talk at AQIS 2024 in Sapporo, Japan.

  10. Reversibility of quantum resources through probabilistic protocols
    Bartosz Regula and Ludovico Lami
    Nature Communications 15, 3096 (2024)
    Presented at QIP 2024arXivpdfjournal pdf