Algorithms for physics

The exploration of condensed matter systems is more and more often approached through numerical methods.
An important part of our reflection is turned towards the development of new methods. These methods can either improve, substantially, the efficiency of existing codes (Anthony Maggs, Coulomb interactions through constrained
algorithms) or allow one to pull out material properties from new experimental techniques (Michael Schindler, Anthony Maggs, confocal microscopy). A final, important realization of this axis is the development with Olivier Dauchot of algorithms and models for the study of self-propelled particles. Over the previous five years this has formed the strongest axis linking the theory group to the experimentalists in Gulliver.

Visualisation of the effective interaction matrix between moving hard disks, arranged in a hexagonal crystal. The position indicates the position of the neighbor with respect to the center particle, the color code shows sign and logarithm of various matrix elements and symmetry aspects of the matrishows sign and logarithm of various matrix elements and symmetry aspects of the matrix. Taken from : Michael Schindler and A. C. Maggs The range and nature of effective interactions in hard-sphere solids Soft Matter 12 (2016) 2612

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Statistical physics

 

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