| <br>[- Source](http://jeffersonlab.github.io/qphix/)<br>[- Bench](https://repository.prace-ri.eu/git/UEABS/ueabs/-/tree/r2.2-dev/qcd/part_2)<br>[- Summary](https://repository.prace-ri.eu/git/UEABS/ueabs/-/blob/r2.2-dev/qcd/part_2/README.md) | lattice Quantum Chromodynamics Part 2 - QPHIX | C++ | yes | yes | no | -- | Part 2: Xeon(Phi) is using a QPhiX kernel which is optimize to run on x86, in particular Intel Xeon (Phi). [Test case A - 96x32x32x32] Small problem size. CG solver involving Wilson Dirac stencil. Domain Decomposition, Memory bandwidth, strong scaling, MPI latency. [Test case B - 126x64x64x64] Moderate problem size. CG solver on Wilson Dirac stencil. Bandwidth bounded |
| <br>[- Source](https://repository.prace-ri.eu/ueabs/QCD/1.3/QCD_Source_TestCaseA.tar.gz)<br>[- Bench](https://repository.prace-ri.eu/git/UEABS/ueabs/-/tree/r2.2-dev/qcd/part_cpu)<br>[- Summary](https://repository.prace-ri.eu/git/UEABS/ueabs/-/blob/r2.2-dev/qcd/part_cpu/README.md) | lattice Quantum Chromodynamics - CPU Part - legacy UEABS | C/Fortran | yes | yes/no | No | -- | CPU part based on UEABS QCD CPU part (legacy) benchmark kernels (last update 2017). Based on 5 different Benchmark applications representative for the European Lattice QCD community (see doc for more details). |
# Quantum Espresso <a name="espresso"></a>
QUANTUM ESPRESSO is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density-functional theory, plane waves, and pseudopotentials (norm-conserving, ultrasoft, and projector-augmented wave). QUANTUM ESPRESSO stands for opEn Source Package for Research in Electronic Structure, Simulation, and Optimization. It is freely available to researchers around the world under the terms of the GNU General Public License. QUANTUM ESPRESSO builds upon newly restructured electronic-structure codes that have been developed and tested by some of the original authors of novel electronic-structure algorithms and applied in the last twenty years by some of the leading materials modeling groups worldwide. Innovation and efficiency are still its main focus, with special attention paid to massively parallel architectures, and a great effort being devoted to user friendliness. QUANTUM ESPRESSO is evolving towards a distribution of independent and inter-operable codes in the spirit of an open-source project, where researchers active in the field of electronic-structure calculations are encouraged to participate in the project by contributing their own codes or by implementing their own ideas into existing codes.
QUANTUM ESPRESSO is written mostly in Fortran90, and parallelised using MPI and OpenMP.
