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Dr Andrew James

Profile summary

  • Central Academic Staff
  • Lecturer in Physics
  • Faculty of Science, Technology, Engineering & Mathematics
  • School of Physical Sciences
  • andrew.james

Professional biography

I received my DPhil in theoretical physics from the University of Oxford before moving to the U.S., where I worked at the University of Virginia and Brookhaven National Laboratory. I then returned to the UK to take up an EPSRC postdoctoral fellowship at UCL, before becoming a lecturer at the OU.

Research interests

My research area is theoretical condensed matter physics, particularly systems that exhibit exotic behaviour due to strong correlations or quantum fluctuations. My work includes subjects in quantum magnetism, high temperature superconductors, low dimensional systems (quantum chains, wires and quasi-2D systems), many-body entanglement and cold atomic gases. I seek to understand these unconventional quantum systems, and to develop the necessary tools to do so. I use both analytical and numerical methods and often collaborate with experimentalists.

I have developed open source code to study 2D many-body quantum systems, realised as large arrays of coupled quantum chains. This has proved particularly useful for studying out-of-equilibrium dynamics (time dependent behaviour) in such systems. A technical talk I gave on some of this work is available to view here.

Publications

Nonthermal States Arising from Confinement in One and Two Dimensions (2019)
James, Andrew J. A.; Konik, Robert M. and Robinson, Neil J.
Physical Review Letters, 122, Article 130603(13)
Signatures of rare states and thermalization in a theory with confinement (2019)
Robinson, Neil J.; James, Andrew J. A. and Konik, Robert M.
Physical Review B, 99, Article 195108(19)
Non-perturbative methodologies for low-dimensional strongly-correlated systems: From non-Abelian bosonization to truncated spectrum methods (2018-04)
James, Andrew J. A.; Konik, Robert M.; Lecheminant, Philippe; Robinson, Neil J. and Tsvelik, Alexei M.
Reports on Progress in Physics, 81, Article 46002(4)
Auxiliary fermion approach to the resonant inelastic x-ray scattering response in an underdoped cuprate (2017-10-15)
Shi, Yifei; James, Andrew J. A.; Demler, Eugene and Klich, Israel
Physical Review B, 96, Article 155101(15)
Quantum quenches in two spatial dimensions using chain array matrix product states (2015-10-15)
James, A. J. A. and Konik, R. M.
Physical Review B, 92, Article 161111(R)(16)
Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates (2014-12-01)
Dean, M. P. M.; James, A. J. A.; Walters, A. C.; Bisogni, V.; Jarrige, I.; Hücker, M.; Giannini, E.; Fujita, M.; Pelliciari, J.; Huang, Y. B.; Konik, R. M.; Schmitt, T. and Hill, J. P.
Physical Review B, 90, Article 220506(R)(22)
Understanding the entanglement entropy and spectra of 2D quantum systems through arrays of coupled 1D chains (2013-06-15)
James, Andrew J. A. and Konik, Robert M.
Physical Review B, 87, Article 241103(R)(24)
High-Energy Magnetic Excitations in the Cuprate Superconductor Bi2Sr2CaCu2O8+δ: Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom (2013-04-05)
Dean, M. P. M.; James, A. J. A.; Springell, R. S.; Liu, X.; Monney, C.; Zhou, K. J.; Konik, R. M.; Wen, J. S.; Xu, Z. J.; Gu, G. D.; Strocov, V. N.; Schmitt, T. and Hill, J. P.
Physical Review Letters, 110, Article 147001(14)
Phase Diagram of Two-Dimensional Polar Condensates in a Magnetic Field (2011-04-08)
James, A. J. A. and Lamacraft, A.
Physical Review Letters, 106, Article 140402(14)
Non-Fermi-Liquid Fixed Point for an Imbalanced Gas of Fermions in 1+ϵ Dimensions (2010-05-14)
James, A. J. A. and Lamacraft, A.
Physical Review Letters, 104, Article 190403(19)