Skip to content
Snippets Groups Projects
Commit 8511c237 authored by Alvarez, Gonzalo's avatar Alvarez, Gonzalo
Browse files

dispersion.pl6 added

parent 267f64a8
No related branches found
No related tags found
No related merge requests found
#!/usr/bin/perl6
use v6;
sub MAIN(Int $L, $t, $r, Str $bc = "open")
{
my $tpr = $t + $r;
my $tmr = $t - $r;
my @disp;
for 0..^$L -> Int $mm {
my $m = ($bc eq "periodic") ?? $mm !! $mm + 1;
my $sk = -2.0*cos(findKdependence($m, $L, $bc));
my $e = $tpr*$sk;
push @disp, $e;
$e = $tmr*$sk;
push @disp, $e;
}
my @disp2 = @disp.sort;
say "Eigenvalues: ";
say @disp2.join(' ');
say "Full Energies: ";
say sumEnergies(@disp2).join("\n");
}
sub sumEnergies(@disp)
{
my @a;
my $sum = 0;
my $n = @disp.elems;
for 0..^$n -> Int $ind {
$sum += @disp[$ind];
my Int $jnd = $ind + 1;
push @a, "$jnd\t$sum";
}
return @a;
}
sub findKdependence($m, $L, $bc)
{
return ($bc eq "periodic") ?? kperiodic($m, $L) !! kopen($m, $L);
}
sub kperiodic($m, $L)
{
2.0*$m*pi/$L;
}
sub kopen($m, $L)
{
$m*pi/($L + 1);
}
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment