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71 lines
2.2 KiB
OCaml
71 lines
2.2 KiB
OCaml
let () =
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let open Command_line in
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begin
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set_header_doc (Sys.argv.(0) ^ " - QCaml command");
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set_description_doc "Runs a F12-Full CI calculation";
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set_specs
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[ { short='b' ; long="basis" ; opt=Mandatory;
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arg=With_arg "<string>";
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doc="Name of the file containing the basis set"; } ;
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{ short='a' ; long="aux_basis" ; opt=Mandatory;
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arg=With_arg "<string>";
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doc="Name of the file containing the auxiliary basis set"; } ;
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{ short='x' ; long="xyz" ; opt=Mandatory;
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arg=With_arg "<string>";
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doc="Name of the file containing the nuclear coordinates in xyz format"; } ;
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{ short='m' ; long="multiplicity" ; opt=Optional;
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arg=With_arg "<int>";
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doc="Spin multiplicity (2S+1). Default is singlet"; } ;
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{ short='c' ; long="charge" ; opt=Optional;
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arg=With_arg "<int>";
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doc="Total charge of the molecule. Default is 0"; } ;
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]
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end;
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(* Handle options *)
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let basis_file = Util.of_some @@ Command_line.get "basis" in
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let aux_basis_filename = Util.of_some @@ Command_line.get "aux_basis" in
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let nuclei_file = Util.of_some @@ Command_line.get "xyz" in
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let charge =
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match Command_line.get "charge" with
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| Some x -> int_of_string x
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| None -> 0
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in
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let multiplicity =
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match Command_line.get "multiplicity" with
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| Some x -> int_of_string x
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| None -> 1
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in
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let ppf =
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if Parallel.master then Format.std_formatter
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else Printing.ppf_dev_null
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in
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let simulation =
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Simulation.of_filenames ~charge ~multiplicity ~nuclei:nuclei_file basis_file
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in
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let hf = HartreeFock.make simulation in
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Format.fprintf ppf "@[%a@]@." HartreeFock.pp_hf hf;
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let mo_basis =
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MOBasis.of_hartree_fock hf
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in
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let fcif12 =
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F12CI.make ~simulation ~frozen_core:true ~mo_basis ~aux_basis_filename ()
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in
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let ci = F12CI.ci fcif12 in
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Format.fprintf ppf "FCI energy : %20.16f@." ((CI.eigenvalues ci).{1} +. Simulation.nuclear_repulsion simulation);
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let _, e_cif12 = F12CI.eigensystem fcif12 in
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Format.fprintf ppf "FCI-F12 energy : %20.16f@." (e_cif12.{1} +. Simulation.nuclear_repulsion simulation);
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