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Quantum ESPRESSO (PWscf)

Status

https://github.com/QEF/q-e/releases/tag/qe-6.3

New in 6.3 version:
New implementation, using a more robust algorithm for the Wigner-Size construction in EPW.
(Samuel Ponce and Carla Verdi)

New application for optical spectra computation using optimized basis sets
(Paolo Umari, Nicola Marzari and Giovanni Prandini).

Improved interface between TDDFPT and Environ using plugins( Oliviero Andreussi)

Improved FFT threading (Ye Luo, Argonne)

EXX: ACE can be projected on arbitrary number of orbitals
Slight change in SCF convergence with ACE (dexx) properly
accounting for difference between 2*<new|V(old)|new>
and <new|V(old)|new> + <old|V(new)|old> (see “fock3” term)
SCDM and localized exchange is now compatible with ecutfock
Localized exchange can deal with virtual orbitals (empty bands)
(Ivan Carnimeo)

Spin-polarized X3LYP (experimental)

EPW: Electronic transport (Boltzmann transport equation)
Iterative Boltzmann transport equation (experimental)
Improved way to compute Wigner-Seitz vectors
Cumulant treatement (model)
Possible screening
Support for exclude bands
Calculation of velocity beyond the local approximation (experimental)

Problems fixed in 6.3 version:
Stress with hybrid functionals and Gamma point was grossly wrong
(5ed1486)

EPW: Velocity in the dipole approximation was unstable because of
G-vector ordering.

Real-space augmentation functions were crashing with -nt N option

Calculation of ELF wasn’t always working due to a bad usage of FFT
descriptors – noticed by Enrique Zanardi Maffiotte (commit a86fb75)

Workaround for gfortran bug in FoX (commit 5b36b69) and for pgi+openmp
bug (f43e72c)

Reading of starting wavefunctions from file, including restart case,
wasn’t always working as expected. This might be at the origin of
mysterious “davcio errors” (April 18, 2018)

Parameters for electric fields were not saved to the new XML file, thus
breaking some forms of postprocessing (noticed by Thomas Brumme and
Giovanni Cantele, fixed April 18, 2018)

Bug in reading (with FoX) the augmentation part of pseudopotentials in
upf v.2 format. The bug shows up only for PPs generated using David
Vanderbilt’s code, yielding a mysterious message “Error in scalartorealdp
Too few elements found” (March 20, 2018)

LDA+U for spin-orbit (kind=1) was crashing for one k-point, trying to read
data not previously saved (noticed by Christof Wolf, Feb 8, 2018)

ibrav =-13 wasn’t documented and did not recognize the correct parameter
cosBC (noticed by Jose’ Conesa, Jan 26, 2018)

Yet another problem with the final scf step in a vc-relax calculation: if
restarted from an interrupted calculation, the final step was trying to
read the charge density with a different number of G-vectors (Jan 23, 2018)

CP with LDA+U: the choice of the LDA+U manifolds from atomic wavefunctions
was sometimes not working properly due to a missing check (Jan 22, 2018)

pw2bgw.x fixed, courtesy G. Samsonidze (Jan.16, 2018)

Band parallelization was broken in one of the last commits
just before v.6.2.1 (Dec.23, 2017)

TDDFPT in “lr_addus_dvpsi.f90” had a bug for systems with USPP
and more than 2 atoms (Dec.22, 2017) (Oleksandr Motornyi,
Michele Raynaud, Iurii Timrov, Nathalie Vast, Andrea Dal Corso)

Phonons with images wasn’t working in v.6.2.1 with old PP files
containing “&” in the header section (Dec.20, 2017)

PWscf in “manypw” mode wasn’t working due to a bad IF (Dec.12, 2017)

Incompatible changes in 6.3 version:

EPW: Removal of q-point paralelization (not very used and generated large code
duplication) ==> removal of the parallel_k and parallel_q input variables.

various subroutines computing gradients and similar quantities using FFTs
have been harmonized and collected into Modules/gradutils.f90

subroutine “ggen” split into two subroutines: “ggen” takes care of
G-vectors for the FFT grid only, “ggens” for the subgrid only

FFT interfaces fwfft, invfft now accept only ‘Rho’, ‘Wave’, ‘tgWave’.
Together with FFT descriptor, these options cover all cases.

Structure for ‘custom’ FFT (exx_fft) deleted from exact exchange code,
FFT descriptor dfftt and a few variables used instead
(a different exx_fft structure is still present in GWW)

FFT indices nl, nlm, nls, nlsm, moved from their previous location
(gvect, gvecs) into FFT descriptors (dfft* structures)

Development moved to GitLab

特記事項

フリーソフト。一時期、開発がストップしていたが、最近、非常に活発になっています。

PWgui

ESPRESSOは内部にPWguiというGUI toolを持っています。

セッティングから、input fileの作成(エディタ)、並列などでのジョブの投入などがこのGUI上から可能です。

可視化にはXCrySDenを用います。これも、PWguiから呼び出す事が出来ます。

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