In the Block Sphere
the world is different
and we can visualize
qubit states and gates
in a more efficient way.
We can also reconstruct
an arbitrary unknown qubit state
by measuring the Block vector
because its components
are the expectation values
of the three Pauli operator.
To perform these experiments
we have Block measurement circuit
so it’s possible to see
the reality in 3 dimensions
and not only the linearity.
That’s why we continue
to study this wonderful world.