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  • ALGO (category Many-body perturbation theory)
    ALGO = Normal | VeryFast | Fast | Conjugate | All | Damped | Subrot | Eigenval | Exact | None | Nothing | CHI | G0W0 | GW0 | GW | scGW0 | scGW | G0W0R...
    8 KB (969 words) - 07:08, 20 October 2023
  • 6 {\displaystyle 10^{-6}} should be obtained in 10-15 iterations. In the Many-Body Perturbation Theory calculations (GW,RPA, and BSE), a large number of...
    3 KB (386 words) - 13:35, 30 May 2022
  • order to obtain precise results. On the other hand, for large systems with many atoms and/or when using meta-GGA functionals, attaining an energy convergence...
    1 KB (173 words) - 20:24, 15 November 2023
  • compilation, e.g., the use of MPI, the advanced molecular dynamics features, etc. Many precompiler flags are set by default in the templates provided for the makefile...
    8 KB (877 words) - 13:34, 19 March 2024
  • The many-body dispersion energy method (MBD@rsSCS) of Tkatchenko et al. is based on the random-phase expression for the correlation energy E c = ∫ 0 ∞...
    6 KB (601 words) - 08:58, 20 October 2023
  • NOMEGA (category Many-body perturbation theory)
    NOMEGA = [integer]  Description: NOMEGA specifies the number of (imaginary) frequency and imaginary time grid points. Typically NOMEGA should be chosen...
    2 KB (233 words) - 08:51, 21 February 2024
  • (available as of VASP.5.3.5) IVDW=202 : Many-body dispersion energy method (MBD@rSC) (available as of VASP.5.4.1) IVDW=263 : Many-body dispersion energy with fractionally...
    4 KB (729 words) - 22:20, 11 February 2024
  • blocked-Davidson algorithm (ALGO=Normal) is generally rather slow, and in many cases the Pulay mixer will be unable to determine the proper ground-state...
    2 KB (262 words) - 08:29, 18 October 2023
  • Bethe-Salpeter-equations calculations (category Many-body perturbation theory)
    05 ALGO = BSE NBANDSO = 4  ! determines how many occupied bands are used NBANDSV = 8  ! determines how many unoccupied (virtual) bands are used OMEGAMAX...
    13 KB (1,912 words) - 17:34, 7 February 2024
  • any additional scaling. Ion species and numbers: This section defines how many ions of each species are present. The first line lists the species names...
    17 KB (1,043 words) - 12:12, 18 October 2023
  • CSHIFT (category Many-body perturbation theory)
    CSHIFT = [real]  Description: CSHIFT sets the (small) complex shift η in the Kramers-Kronig transformation and Hilbert transformation in linear response...
    1 KB (148 words) - 11:22, 8 February 2024
  • LMAXMIX, but the following cases are exceptions: DFT+U calculations require, in many cases, an increase of LMAXMIX to 4 for d-electrons (or 6 for f-elements)...
    2 KB (239 words) - 07:21, 13 July 2023
  • LIBMBD_METHOD selects one of the methods available in the library libMBD of many-body dispersion methods. LIBMBD_METHOD can be set to a label (string) corresponding...
    2 KB (212 words) - 14:01, 19 March 2024
  • number of frequency grid points is determined by the parameter NEDOS. In many cases it is desirable to increase this parameter significantly from its default...
    4 KB (544 words) - 15:09, 2 February 2024
  • NBANDSO (category Many-body perturbation theory)
    NBANDSO = [integer]  Description: NBANDSO determines how many occupied orbitals are included in the Casida/BSE calculations or time propagation (ALGO=TIMEEV...
    2 KB (276 words) - 09:17, 24 June 2022
  • NBANDSV (category Many-body perturbation theory)
    NBANDSV = [integer]  Description: NBANDSV determines how many unoccupied orbitals are included in the Casida/BSE calculations or timepropagation. For the...
    2 KB (273 words) - 11:24, 24 June 2022
  • conjugated gradient, which is considered to be obsolete). NPAR determines how many bands are treated in parallel. The current default is NPAR=number of cores...
    5 KB (716 words) - 14:50, 8 April 2022
  • ENCUTGW (category Many-body perturbation theory)
    {q} }}-\epsilon _{n{\mathbf {k} }}-\omega -i\eta }}.} ENCUTGW controls how many G {\displaystyle \mathbf {G} } vectors are included in the the response function...
    5 KB (784 words) - 14:07, 24 April 2023
  • OMEGAMAX (category Many-body perturbation theory)
    OMEGAMAX = [real] Default: OMEGAMAX = outermost node in dielectric function ϵ ( ω ) {\displaystyle \epsilon (\omega )} /1.3  Description: OMEGAMAX specifies...
    4 KB (544 words) - 10:25, 19 July 2022
  • NMAXFOCKAE and LMAXFOCKAE (category Many-body perturbation theory)
    restoration). This flag generally only applies to the Fock-exchange part as well as many-body post DFT methods (GW, RPA, MP2, etc.). In the PAW method, the difference...
    7 KB (1,013 words) - 12:17, 29 March 2023
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