The reality of subatomic level is different than the reality we are familiar.
One of the possibilities includes the ability of such particles to communicate with each other instantly, from afar (called entanglement).
Quantum computers can find solutions much faster than classical computers. Such may solve problems that cannot be evaluated by classical systems since quantum computers can analyze exponentially more complex data and at much faster rates.
We are still in the infancy of analyzing subatomic particles and the promise of this technology will not be realized for a number of years.