Alex's research is in the field of theoretical condensed matter physics. It is concerned particularly with systems where the inter-electron interactions are very strong so that conventional perturbation methods for the calculation of the electronic properties are not applicable, and non-perturbative methods are required.
Dr Alex Hewson's personal web page can be found at http://www.ma.ic.ac.uk/~ahewson
Hewson AC, 2016, Renormalized parameters and perturbation theory in dynamical mean-field theory for the Hubbard model, Physical Review B, Vol:94, ISSN:2469-9950
et al., 2016, Conditions for observing emergent SU(4) symmetry in a double quantum dot, Physical Review B, Vol:93, ISSN:2469-9950
Pandis V, Hewson AC, 2015, Analytic Flow Equations for the Fermi Liquid Parameters of the Anderson Impurity Model, Physical Review Letters, Vol:115, ISSN:0031-9007
Pandis V, Hewson AC, 2015, High-order terms in the renormalized perturbation theory for the Anderson impurity model, Physical Review B, Vol:92, ISSN:2469-9950
Edwards K, Hewson AC, Pandis V, 2013, Perturbational scaling theory of the induced magnetization in the impurity Anderson model, Physical Review B, Vol:87, ISSN:1098-0121