I am a Surrey Future Fellow. I work at the intersection of fundamental physics and quantum information theory to unlock the full potential of quantum technologies.

Current research

Measurements allow us to interrogate nature. Motivated by this, I am developing a theoretical framework for quantum sensing, metrology and estimation in regimes where fundamental physics may play a role. The goal is to exploit such a framework as a new path to make progress in the foundations of physics.


My professional practice is guided by the following ideas:

  • Understanding time is one of the most important tasks of science
  • To get further insight on the foundations of physics, an effective approach is to address inconsistencies in regimes where conflicting physical theories may apply
  • By virtue of extending the propositional calculus, probability theory offers the best framework to connect physical theories with experiments
  • Science papers should not only inform, but also teach

What does a theoretical physicist do?

My job is to search for the general principles that govern nature, and to create a mathematical framework for their precise formulation. The motivation behind this is the identification of rational explanations for the phenomena that underpin human experience. Creating and understanding are thus my core activities.

*Please note that 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.