My area of research



I am a theoretical physicist working in Quantum Field Theory (QFT). I specialize on the study of integrable 1+1-dimensional QFTs and other related theories, such as statistical models, conformal field theories and integrable quantum spin chains.
Integrable models posses extra symmetries (that is, a large or infinite number of conserved quantities). This leads to very strong constraints on the form and value of all their physical quantities. Integrability combined with the restriction to one space dimension allows for the formulation of theories whose scattering amplitudes, form factors and correlation functions may be computed exactly. The systematic computation of these quantities is referred to as the "Bootstrap Programme" and it has attracted a great deal of attention over the last four decades.

Much of the work that I have carried out relates to the development of such a programme, that is, computing scattering matrices, form factors and correlation functions in a variety of models and investigating their analytical properties and mathematical structures. A particular class of models which I have studied in depth are the homogenous sine-Gordon models. I have also been interested in integrable models with boundaries and defects. The main techniques that I have used in this context are the Thermodynamic Bethe ansatz and the form factor programme. Much of my work in these areas has been carried out in collaboration with Prof. Andreas Fring.

In recent years, I have been appliying some of the techniques above to the development of a systematic approach to the computation of the entanglement entropy associated to a the ground state of integrable QFTs and quantum spin chains. This work has been carried out in collaboration with Dr Benjamin Doyon and Prof. John Cardy and continues to be pursued in collaboration with Dr Doyon and my PhD student Mr Emanuele Levi.
My past work also includes collaborations with Prof. Jean-Michel Maillet, Prof. J. Luis Miramontes, Dr. Carla Figueira de Morisson Faria, Dr Frank Göhmann, Mr Julian Dreißig, and Dr Christian Korff.

A complete publications' list can be found here.