School of Physics and Astronomy

Dr Ricardo Monteiro


Royal Society University Research Fellow

Telephone: 0207 882 7813
Room Number: G. O. Jones Building, Room 225


I joined the Centre for Research in String Theory in 2017. Previously, I held research positions at CERN, at the Mathematical Institute in Oxford, and at the Niels Bohr Institute in Copenhagen. I did my graduate studies at DAMTP in Cambridge, and my undergraduate studies at IST in Lisbon.


I currently teach the 3rd-year course Spacetime and Gravity. The course is a basic introduction to Einstein's theory of general relativity.

I also supervise undergraduate projects.


Research Interests:

I have a broad interest in high-energy theoretical physics. My recent work focuses on perturbative aspects of quantum field theory, quantum gravity and string theory.

One of my main areas of activity has been the perturbative description of gravity as a double copy of gauge theory. This idea appeared in the study of scattering amplitudes, which are notoriously complicated in theories of gravity if traditional methods are used. The double-copy technique allows us to perform certain gravity computations using much simpler computations in gauge theory. My goals here are two-fold: to investigate the mathematical structure behind the double copy, including at loop level (quantum effects), and to apply this technique to a wider set of problems, including the study of classical solutions (perturbative or exact) in gravity theories.

My other major line of work is the description of certain quantum field theories in terms of worldsheet models inspired by string theory, known as ambitwistor strings. These models underlie a new mathematical formalism for the scattering amplitudes of massless particles, based on scattering equations that relate the kinematic invariants to the moduli space of a sphere. My main focus here has been the extension of this very promising formalism to loop level, which opens the possibility of a much wider application. Both gauge theory and gravity admit this type of formalism, and this is also a promising avenue to understand the double-copy relation at a more fundamental level.

Apart from these topics, I maintain my interest for areas in which I have worked in the past. These include black holes in general relativity and in string theory, and the AdS/CFT correspondence between a theory of gravity (string theory) and a lower-dimensional (conformal) field theory.


Grants held at QMUL:

Royal Society University Research Fellowship, 2017 - 2021 (£452,148)

Royal Society Grant supporting a PhD Studentship, 2017 - 2021 (£85,492)

Royal Society Grant supporting a PhD Studentship, 2018 - 2022 (£85,992)


You can see a list of my publications at INSPIRE-HEP.

PhD Supervision

Scattering Amplitudes and Ambitwistor Strings

Gravity as a Double Copy of Gauge Theory