English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

The time-dependent generator coordinate method (TDGCM) is a powerful methodto study the large amplitude collective motion of quantum many-body systemssuch as atomic nuclei. Under the Gaussian Overlap Approximation (GOA), theTDGCM leads to a local, time-dependent Schr\"odinger equation in amulti-dimensional collective space. In this paper, we present the version 2.0of the code FELIX that solves the collective Schr\"odinger equation in a finiteelement basis. This new version features: (i) the ability to solve ageneralized TDGCM+GOA equation with a metric term in the collectiveHamiltonian, (ii) support for new kinds of finite elements and different typesof quadrature to compute the discretized Hamiltonian and overlap matrices,(iii) the possibility to leverage the spectral element scheme, (iv) an explicitKrylov approximation of the time propagator for time integration instead of theimplicit Crank-Nicolson method implemented in the first version, (v) anentirely redesigned workflow. We benchmark this release on an analytic problemas well as on realistic two-dimensional calculations of the low-energy fissionof Pu240 and Fm256. Low to moderate numerical precision calculations are mostefficiently performed with simplex elements with a degree 2 polynomial basis.Higher precision calculations should instead use the spectral element methodwith a degree 4 polynomial basis. We emphasize that in a realistic calculationof fission mass distributions of Pu240, FELIX-2.0 is about 20 times faster thanits previous release (within a numerical precision of a few percents).

FELIX-2.0: New version of the finite element solver for the time dependent generator coordinate method with the Gaussian overlap approximation