to calculate excited states and response properties from first-principles based on many-body theory
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…
All Lumen tutorials are now online in the wiki webpage: https://www.lumen-code.org/wiki/index.php?title=Tutorials notice that some inputs are slightly different from the Yambo ones because we are making an effort to simplify them and make them more accessible to new users.
Doxygen documentation for the Lumen code is now available online. Notice that this is an beta version of the documentation. We advice you to visit it again in the next months, we will keep it updated with the latest version of the code.Lumen Doxygen