Jesús Rubio

Dr Jesús Rubio

Theoretical physicist and quantum scientist. Understanding is the work. Creating is the joy.

What do I work on?

I design Bayesian, symmetry-informed frameworks for quantum sensing that remain optimal under finite data and realistic experimental constraints.

Why theoretical physics?

I seek to provide a rational account of the natural phenomena that shape our experience, using mathematics to extract meaning from empirical data.

Research vision

Measurement is our most direct way of questioning nature. Advancing the foundations of physics therefore requires inference frameworks that remain valid when quantum and relativistic effects are relevant, and when limited data and experimental imperfections cannot be neglected. My research develops Bayesian, symmetry-informed approaches to quantum metrology and estimation that are designed to operate under realistic conditions. Key research themes include:

Quantum science and foundations

Quantum information technologies

Beyond specific applications, my work is guided by the view that probability theory, understood as an extension of logical reasoning, provides the most effective framework for connecting physical theories with experiments. I consider time and information as among the most fundamental problems in physics, and I believe that progress in understanding them often emerges from identifying and resolving inconsistencies between overlapping physical theories. I aim for scientific papers that not only report results, but also clarify principles and translate them into actionable methodology, which I regard as the primary contribution of my work to society.

Journal articles

  1. F. Albarelli, D. Branford, J. Rubio (2025)
    Measurement incompatibility in Bayesian multiparameter quantum estimation
    arXiv:2511.16645; GitHub; Zenodo
  2. J. Boeyens, J. Glatthard, E. Gandar, S. Nimmrichter, L. A. Correa, J. Rubio (2025)
    On the role of symmetry and geometry in global quantum sensing
    Quantum Sci. Technol., 10, 045053; arXiv:2502.14817; GitHub
  3. M. Overton, J. Rubio, N. Cooper, D. Baldolini, D. Johnson, J. Anders, L. Hackermüller (2024)
    Adaptive, symmetry-informed Bayesian metrology for precise quantum technology measurements
    arXiv:2410.10615
  4. J. Rubio (2024)
    First-principles construction of symmetry-informed quantum metrologies
    Phys. Rev. A, 110, L030401; arXiv:2402.16410
  5. A.S.F. Oliveira, J. Rubio, C.E.M. Noble, J.L.R. Anderson, J. Anders, A.J. Mulholland (2023)
    Fluctuation relations to calculate protein redox potentials from molecular dynamics simulations
    J. Chem. Theory Comput. 20, 1, 385-395; arXiv:2302.13089; GitHub
  6. J. Glatthard, J. Rubio, R. Sawant, T. Hewitt, G. Barontini, L. A. Correa (2022)
    Optimal cold atom thermometry using adaptive Bayesian strategies
    PRX Quantum, 3, 040330; arXiv:2204.11816
  7. J. Rubio (2022)
    Quantum scale estimation
    Quantum Sci. Technol., 8, 015009; arXiv:2111.11921
  8. D. Branford, J. Rubio (2021)
    Average number is an insufficient metric for interferometry
    New J. Phys., 23, 123041; arXiv:2107.06698
  9. N. Eerqing, S. Subramanian, J. Rubio, T. Lutz, H.-Y. Wu, J. Anders, C. Soeller, F. Vollmer (2021)
    Comparing transient oligonucleotide hybridization kinetics using DNA-PAINT and optoplasmonic single-molecule sensing on gold nanorods
    ACS Photonics, 8, 10, 2882-2888; arXiv:2103.07520
  10. J. Rubio, J. Anders, L. A. Correa (2021)
    Global quantum thermometry
    Phys. Rev. Lett., 127, 190402; arXiv:2011.13018; GitHub
  11. J. Rubio, P. A. Knott, T. J. Proctor, J. A. Dunningham (2020)
    Quantum sensing networks for the estimation of linear functions
    J. Phys. A: Math. Theor., 53, 344001; arXiv:2003.04867
  12. J. Rubio, J. Dunningham (2020)
    Bayesian multiparameter quantum metrology with limited data
    Phys. Rev. A, 101, 032114; arXiv:1906.04123
  13. R. Nichols, L. Mineh, J. Rubio, J. C. F. Matthews, P. A. Knott (2019)
    Designing quantum experiments with a genetic algorithm
    Quantum Sci. Technol., 4, 045012; arXiv:1812.01032; GitHub
  14. J. Rubio, J. Dunningham (2019)
    Quantum metrology in the presence of limited data
    New J. Phys., 21, 043037; arXiv:1810.12857
  15. J. Rubio, P. Knott, J. Dunningham (2018)
    Non-asymptotic analysis of quantum metrology protocols beyond the Cramér-Rao bound
    J. Phys. Commun., 2, 015027; arXiv:1707.05022
  16. J. Rubio, A. Luis (2014)
    Spin state in the propagation of quantum relativistic particles along classical trajectories
    Phys. Rev. A, 89, 052128; arXiv:1402.6063

PhD Thesis

J. Rubio Jiménez (2020)
Non-asymptotic quantum metrology: extracting maximum information from limited data
University of Sussex; arXiv:1912.02324; GitHub

Others

A. Sánchez de Miguel, J. Zamorano, B. Pila-Díez, J. Rubio, R. Ruiz, I. Rodríguez-Herranz, A. González-Pérez (2011)
Light pollution in Spain 2010
Highlights of Spanish Astrophysics VI, IX Scientific Meeting of the Spanish Astronomical Society (SEA), Madrid, Sept. 13–17, 2010, pp. 784–784

J. Rubio Jiménez (2009)
Quince años de pasión por la astronomía
Tribuna Complutense, Otra Mirada, p. 24

Selected talks

Biography

Jesús is a theoretical physicist and quantum scientist working on quantum sensing and metrology, developing optimal measurement algorithms applicable to experimental settings.

After completing the Spanish Baccalaureate, he earned a Licenciatura degree at the Complutense University of Madrid and an MSc at the Institute for Theoretical Physics of Madrid, specialising in particle physics, cosmology, and quantum information theory. In 2019, he completed a PhD on quantum optics, Bayesian metrology, and sensing networks at the University of Sussex.

Since then, his work has focused on developing practically deployable frameworks for quantum metrology under realistic constraints, in collaboration with multiple research organisations. This includes global thermometry, scale estimation, and symmetry-informed sensing validated in cold-atom experiments, together with foundational results in Bayesian multiparameter quantum estimation.

He also has extensive experience in teaching and knowledge transfer in physics, including MSc-level module leadership, and is a Fellow of Advance HE (FHEA).

He currently applies this body of work to problems spanning fundamental physics and emerging quantum technologies.

If you wish to contact me

The best way to contact me is by email. I prefer this option because it is an open, universal standard. Should I not respond promptly, please do send a follow-up, as emails can occasionally slip through despite my best efforts.

You are also welcome to connect with me via Bluesky or LinkedIn, where a more detailed version of my CV is available. In any case, all content I share on social platforms is also archived in the blog.

Please note: The short version of my name is either J. Rubio or J. Rubio Jiménez, as Rubio Jiménez are both surnames and I do not have a middle name.