diotalevi,
I could not find a single example of the binding operator anywhere in the documentation for Quantum::Superpositions. I did however find the following code interesting:

#!/usr/bin/perl
use Quantum::Superpositions;
$\ = $/;

# Create a disjunction of 'a' and 'b'.
$dis = any( 'a', 'b' );
print $dis;
print "=~: ",$dis =~ /\bb\b/; # true
print "eq: ",$dis eq 'b';   # true
[download]

I do believe Perl 6's built in any will work with the binding operator. I also took a peak under the hood of the module itself. I could not find a binding operator listed:

q{<}    =>  sub { qblop(swap(@_), sub { $_[0] < $_[1]   })},
q{<=>}  =>  sub { qblop(swap(@_), sub { $_[0] <=> $_[1] })},
... all kinds of other tests
q{~}    =>  sub { $_[0]->quop(sub { ~$_[0]     })},
[download]

Happy hunting!

Cheers - L~R

Update: I guess I spent too long digging around under the hood as Matt beat me to the punch.

Update 2: Chmrr reminded me that ~ is bitwise negation and that the binding operator can't be overloaded - see perldoc overload - Chmrr++