From the perspective of quantum computing, entanglement can be visualized as each qubit sphere being connected by elastic strings*4 to every other qubit (figure 8.4c). Now, let us imagine that we rotate just one of the spheres. Without entanglement, the rotation will not affect neighboring qubits. But if our qubit is entangled with other qubits, then the rotation changes the tensions in all the connecting strings between these connected qubits. The computational resource of all those entanglement strings increases exponentially with the number of qubits, which means that it increases very
...more
