University Lecturer

Alex Thom is a University Associate Professor in Theoretical Chemistry in the University of Cambridge. His research interests are in Theoretical and Computational Chemistry, specializing in method and software development.

Current projects involve the calculation of accurate electronic energies using Monte Carlo techniques, the description of excited states of medium-large molecules (from chromophores to single-molecule magnets) using new methodologies, and the application of Quantum Chemical Algorithms on Quantum Computers.

I am also a developer of the HANDE QMC package (version 1.6 released June 2022) which (amongst many features) performs Full Configuration Interaction Quantum Monte Carlo and Coupled Cluster Monte Carlo on molecular and solid-state systems, and am happy to be contacted with questions about using this or potential applications.

As part of the EXTRA Consortium, we have been looking at the development processes involved in writing scientific software on modern reconfigurable architectures (principally FPGAs), and currently have projects implementing Quantum Monte Carlo methods on these architectures. I am also part of the Cambridge Leverhulme Centre for Life in the Universe.

PhD and MPhil Positions

If you are interested in pursuing an MPhil or PhD in my group, please contact my secretary, sending a CV by email.  Applications to begin October 2025 are now open. For consideration in the funding competition applications must be received by 3rd December 2024.  Applicants with external funding will still be able to apply in early 2025. 
 

I am part of the Centre for Doctoral Training in Computational Methods for Materials Science and the SynTech Centre for Doctoral Training as well as the Leverhulme Centre for Life in the Universe which all offer funded PhD positions, and I am happy to accept applicants for the MPhil in Scientific Computing and also Chemistry. Some example project ideas can be found here.

Dr Thom discusses his research

Publications

Theory and implementation of a novel stochastic approach to coupled cluster.
CJC Scott, R Di Remigio, TD Crawford, AJW Thom
Journal of Chemical Physics
(2020)
153
Reaching Full Correlation through Nonorthogonal Configuration Interaction: A Second-Order Perturbative Approach.
HGA Burton, AJW Thom
Journal of Chemical Theory and Computation
(2020)
16
Reaching Full Correlation through Nonorthogonal Configuration Interaction: A Second-Order Perturbative Approach
HGA Burton, AJW Thom
(2020)
Periodicity of Single-Molecule Magnet Behaviour of Heterotetranuclear Lanthanide Complexes across the Lanthanide Series: A Compendium
DC Izuogu, T Yoshida, G Cosquer, JN Asegbeloyin, H Zhang, AJW Thom, M Yamashita
Chemistry - A European Journal
(2020)
26
Ionic-caged heterometallic bismuth–platinum complex exhibiting electrocatalytic CO2 reduction
T Yoshida, HM Ahsan, H-T Zhang, DC Izuogu, H Abe, H Ohtsu, T Yamaguchi, BK Breedlove, AJW Thom, M Yamashita
Dalton Trans
(2020)
49
Accelerating Convergence in Fock Space Quantum Monte Carlo Methods.
VA Neufeld, AJW Thom
J Chem Theory Comput
(2020)
16
An Organic-Inorganic Hybrid Exhibiting Electrical Conduction and Single-Ion Magnetism.
Y Shen, G Cosquer, H Ito, DC Izuogu, AJW Thom, T Ina, T Uruga, T Yoshida, S Takaishi, BK Breedlove, Z-Y Li, M Yamashita
Angewandte Chemie (International ed. in English)
(2020)
59
An Organic–Inorganic Hybrid Exhibiting Electrical Conduction and Single‐Ion Magnetism
Y Shen, G Cosquer, H Ito, DC Izuogu, AJW Thom, T Ina, T Uruga, T Yoshida, S Takaishi, BK Breedlove, Z Li, M Yamashita
Angewandte Chemie
(2020)
132
Symmetry in Multiple Self-Consistent-Field Solutions of Transition-Metal Complexes.
BC Huynh, AJW Thom
Journal of Chemical Theory and Computation
(2020)
16
New approaches to study excited states in density functional theory: general discussion
JG Brandenburg, K Burke, E Fromager, M Gatti, S Giarrusso, NI Gidopoulos, P Gori-Giorgi, D Gowland, T Helgaker, MJP Hodgson, L Lacombe, G Levi, P-F Loos, NT Maitra, E Maurina Morais, N Mehta, F Monti, MR Mulay, K Pernal, L Reining, P Romaniello, MR Ryder, A Savin, D Sirbu, AM Teale, AJW Thom, DG Truhlar, J Wetherell, W Yang
Faraday Discussions
(2020)
224

Head of group

Research Interest Group

Telephone number

01223 336470

Email address

College