jacques,
I want to clear up some confusion. qw is white space delimited - period. It is also single quoted, so no interpolation is done.

my @array = ('$one', '@two', '%three');
my @qw_array = ($one @two %three);
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You can't change the delimiter, so if it doesn't do what you want you should use something that does.

my @array = qw(a b c d);
my $temp_string = join ',' , @array;
my @new_array = split ',' , $temp_string;
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The above code is just a demonstration of how to use join and split, but you really should use perldoc -f join and perldoc -f split for more information.

Cheers - L~R