mirror of
https://github.com/LCPQ/quantum_package
synced 2024-11-14 01:53:55 +01:00
73 lines
2.0 KiB
OCaml
73 lines
2.0 KiB
OCaml
open Core.Std;;
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open Qptypes;;
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type t = int64 array with sexp
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let to_int64_array (x:t) = (x:int64 array)
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let to_alpha_beta x =
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let x = to_int64_array x in
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let n_int = (Array.length x)/2 in
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( Array.init n_int ~f:(fun i -> x.(i)) ,
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Array.init n_int ~f:(fun i -> x.(i+n_int)) )
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let to_bitlist_couple x =
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let (xa,xb) = to_alpha_beta x in
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let xa = to_int64_array xa
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|> Array.to_list
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|> Bitlist.of_int64_list
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and xb = to_int64_array xb
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|> Array.to_list
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|> Bitlist.of_int64_list
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in (xa,xb)
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let bitlist_to_string ~mo_tot_num x =
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List.map x ~f:(fun i -> match i with
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| Bit.Zero -> "-"
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| Bit.One -> "+" )
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|> String.concat
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|> String.sub ~pos:0 ~len:(MO_number.to_int mo_tot_num)
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let of_int64_array ~n_int ~alpha ~beta x =
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assert ((Array.length x) = (N_int_number.to_int n_int)*2) ;
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let (a,b) = to_bitlist_couple x
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and alpha = Elec_alpha_number.to_int alpha
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and beta = Elec_beta_number.to_int beta
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in
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if ( (Bitlist.popcnt a) <> alpha) then
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begin
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let mo_tot_num = MO_number.get_max () in
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let mo_tot_num = MO_number.of_int mo_tot_num ~max:mo_tot_num in
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failwith (Printf.sprintf "Expected %d electrons in alpha determinant
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%s" alpha (bitlist_to_string ~mo_tot_num:mo_tot_num a) )
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end;
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if ( (Bitlist.popcnt b) <> beta ) then
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begin
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let mo_tot_num = MO_number.get_max () in
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let mo_tot_num = MO_number.of_int mo_tot_num ~max:mo_tot_num in
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failwith (Printf.sprintf "Expected %d electrons in beta determinant
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%s" beta (bitlist_to_string ~mo_tot_num:mo_tot_num b) )
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end;
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x
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let of_bitlist_couple ~alpha ~beta (xa,xb) =
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let ba = Bitlist.to_int64_list xa in
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let bb = Bitlist.to_int64_list xb in
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let n_int = Bitlist.n_int_of_mo_tot_num (List.length xa) in
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of_int64_array ~n_int:n_int ~alpha:alpha ~beta:beta (Array.of_list (ba@bb))
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let to_string ~mo_tot_num x =
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let (xa,xb) = to_bitlist_couple x in
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[ bitlist_to_string ~mo_tot_num:mo_tot_num xa ;
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bitlist_to_string ~mo_tot_num:mo_tot_num xb ]
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|> String.concat ~sep:"\n"
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