I am a Senior Lecturer (equivalent to an associate professor) in the Theoretical Physics group and the Complexity and Networks programme at Imperial College London. I did my first degree in Natural Sciences (Physics) at Cambridge followed by a PhD at Imperial, supervised by Ray Rivers. I then spent time as a researcher at the University of Alberta in Edmonton Canada, followed by research positions back at Imperial, in part as a Royal Society University Research Fellow.
My main interest is in the behaviour of many body systems both in and out of equilibrium. Currently I am interested in ideas falling under the broad area of complex systems. In particular the properties of Complex Networks, such as the "six degrees of separation", intrigue me. This is both from a theoretical perspective and in terms of applications to practical problems such as bibliometrics or cultural transmission, part of an interest in sociophysics in general. For instance I have an ongoing project in Archaeology.
I'm also interested in Quantum Field theory. My early research was on the many-body problems where the underlying dynamics is described by quantum field theory, a topic known as Thermal Field Theory or Finite Temperature Field Theory. Initially this was in the context of relativistic particle physics which is important for applications such as cosmology and quark gluon plasmas. I later became interested in parallel problems in condensed matter physics, where lab based experiments can be performed. I was also interested in general issues with quantum field theory which led to work on multiplicative anomalies and in turn their implications for zeta-function renormalisation.
Interactions in space for archaeological models DOI: 10.1142/S021952591100327X
The emergence of leadership in social networks DOI: 10.1016/j.physa.2011.11.011
Universality of performance indicators based on citation and reference counts DOI: 10.1007/s11192-012-0694-9
Community structure and patterns of scientific collaboration in Business and Management DOI: 10.1007/s11192-011-0439-1
Flow graphs: Interweaving dynamics and structure DOI: 10.1103/PhysRevE.84.017102
The Theran eruption and Minoan palatial collapse: New interpretations gained from modelling the maritime network
Uncovering space-independent communities in spatial networks DOI: 10.1073/pnas.1018962108
Line graphs of weighted networks for overlapping communities DOI: 10.1140/epjb/e2010-00261-8
Line graphs, link partitions, and overlapping communities DOI: 10.1103/PhysRevE.80.016105
Modelling maritime interaction in the Aegean Bronze Age
Network rewiring models
Exact solution for the time evolution of network rewiring models DOI: 10.1103/PhysRevE.75.056101
Exact solutions for network rewiring models DOI: 10.1140/epjb/e2007-00084-8
Scale-free networks from self-organization DOI: 10.1103/PhysRevE.72.026138