uncertainty principle

Ingenious quantum scientists showed that teleportation can make an end run around the uncertainty principle and achieve a real-world result, secure telecommunications.

This was revolutionary because in quantum theory, one cannot exactly clone, say, a photon with an unknown polarization, since making copies would provide a way to evade the uncertainty principle.

In 1927, Werner Heisenberg announced his uncertainty principle, the core idea underlying the newborn math for describing nature known as quantum mechanics.