to calculate excited states and response properties from first-principles based on many-body theory
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,…
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
After several months, our Robot Farm is finally online. Here you can see the computers on which we test Lumen and all the new branches and developments. https://www.lumen-code.org/robots/
Lumen 2.0 is available for download here:https://gitlab.com/lumen-code/lumen/-/releases/2.0.0 Lumen 2.0 is a fork of Yambo 5.3. In this version we kept the full compatibility with Yambo 5.3, and used the same name for the executables, but many new features as exciton-phonon coupling, Kerr spectroscopy etc… are present in Lumen 2.0. Moreover Lumen 2.0 include also different…
Convergence of dielectric constant with respect the number of k-points can be very slow in many systems. For this reason in Lumen it is implemented a double-grid technique that speeds up convergence versus k-points with a computational cost comparable to the standard calculations. Here we provide a tutorial for this approach: https://www.lumen-code.org/wiki/index.php?title=Fast_convergence_of_dielectric_constant_with_double_grid The method for…
Three PhD students: Anna Romani, Petru Milev and Torsten Geirsoon joint the Lumen team. They will work on different project ranging from non-linear response, pump and probe, magnon, real-time TDDFT.
A new tutorial is online on the generation of user defined external fields for yambo_rt/yambo_nl using ypp_rt or YamboPy.https://www.lumen-code.org/wiki/index.php?title=Real-time_dynamics_with_external_field_read_from_file
A new tutorial on calculating shift current (SC) using Lumencode is now available online.In this tutorial, we present our real-time approach to obtaining the SC response and provide an example involving a monolayer GeS. The role of excitons in the SC response can also be taken into account using our approach. Tutorial is available here…