to calculate excited states and response properties from first-principles based on many-body theory
The next Lumen Hackathon will take place at the University of Milan from 10 to 13 November. Participants will include: Davide Sangalli, Claudio Attaccalite, Myrta Gruning, Fulvio Paleari, Anna Romani, Petru Milev, Giovanni Cistaro, Laura Urquiza and Tian Xiang.We expect this event to yield many new developments for the upcoming versions of Lumen and YamboPy.
A new tutorial on non-linear response at finite temperature is available at the end of the tutorial on finite temperature optical response. https://www.lumen-code.org/wiki/index.php?title=Optical_properties_at_finite_temperature#Using_electron-phonon_quasi-particles_in_real-time_simulations Following this tutorial is possible to calculate second harmonic generation or other non-linear response functions including temperature effects. At present our approach is exact only at the independent particle approximation and it…
A new release of the Lumen code is available on GitLab:https://gitlab.com/lumen-code/lumen/-/releases/2.1.0 This release contains different new features as symmetry analysis, Floquet non-linear response etc.This release fixes also a series a bugs in compilations, execution etc,,Release notes are available at: Release notes 2.1
The Lumen code is now citable. If you use Lumen in your calculations, please cite our Zenodo reference and the Yambo code that Lumen is derived from. Sangalli, D., Reho, R., Alliati, I. M., Cervantes-Villanueva, J., Esquembre Kučukalić, A., Geirsson, T., Leon Valido, D. A., Mellado Pinto, B., Milev, P., Nalabothula, M., Paleari, F., Romani,…
YamboPy 0.7 has been released!Yambopy is a python package providing additional postprocessing and data management functionalities for Lumen (Yambo) and Quantum ESPRESSO. In this new version you will find:*) new exciton postprocessing including symmetry analysis, spin-matrix elements*) new tool to analise dipoles*) exciton radiative lifetimes*) exciton-phonon coupling*) new function for nonlinear optics post-processing The code…
Ford documentation for the Lumen file is online at:https://www.lumen-code.org/ford/index.html We are working to document all files and subroutines of the code in tight connection with theory and mathematical formulas.
Starting from the last versions, Lumen officially support ELPA library:https://elpa.mpcdf.mpg.de/ELPA_USED.htmlELPA is a library that to provide highly efficient eigenvalue solvers for Petaflop systems, and Lumen use it in the solution of the Bethe-Salpeter Equation. If you computer cluster has this library installed you can link it to Lumen to speed up your calculations.Performance analysis on…
A new release of the Lumen code is available here:https://gitlab.com/lumen-code/lumen/-/releases/2.0.1 This release contains mainly bug-fixes to the previous release without new features. Release notes are available at: Release notes 2.0.1
We are pleased to announce that we are organizing a mini-symposium entitled:‘Theory and Modelling of Excited-State Properties in Solids and Nanostructures’at the Condensed Matter Days (JMC) 2026, which will take place in Toulouse from 26 to 30 October.https://jmc2026.sciencesconf.org Registration will open in the spring and we hope to see many of you there! Invited speakers:Fabienne…
A new tutorial is available in the wiki web-page on the Floquet formalism for the calculation of non-linear response functions. Respect to the standard real-time approach Floquet formalism is much faster but at present it is limited to the independent particle approximation with or without scissor operator. In the tutorial we show how to calculate…