Non-relativistic QCD Study of Excited Bottomonia at Finite Temperatures on a Fine Lattice
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Engineering topics
Larsen, Rasmus
Publications and source records attributed to Larsen, Rasmus.
SIMULATeQCD: A simple multi-GPU lattice code for QCD calculations
The rise of exascale supercomputers has fueled competition among GPU vendors, driving lattice QCD developers to write code that supports multiple APIs. Moreover, new developments in algorithms and physics research require frequent updates to existing software. These challenges have to be balanced against constantly changing personnel. At the same time, there is a wide range of applications for HISQ fermions in QCD studies. This situation encourages the development of software featuring a HISQ action that is flexible, high-performing, open source, easy to use, and easy to adapt. In this technical paper, we explain the design strategy, provide implementation details, list available algorithms and modules, and show key performance indicators for SIMULATeQCD, a simple multi-GPU lattice code for large-scale QCD calculations, mainly developed and used by the HotQCD collaboration. The code is publicly available on GitHub.
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Quark Mass Dependence of Heavy Quark Diffusion Coefficient from Lattice QCD
We present the first study of the quark mass dependence of the heavy quark momentum and spatial diffusion coefficients using lattice QCD with light dynamical quarks corresponding to a pion mass of 320 MeV. We find that, for the temperature range 195 MeV < 𝑇 < 293 MeV, the spatial diffusion coefficients of the charm and bottom quarks are smaller than those obtained in phenomenological models that describe the 𝑝 𝑇 spectra and elliptic flow of open heavy flavor hadrons.
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗