William Wootters Created 2026-10-24 Updated 2026-11-05
A theoretical physicist who, with Scott Hill, developed a calculable measure of quantum entanglement for pairs of qubits. Their 1997 work introduced the concurrence approach and obtained an exact preparation-cost formula for mixed states of rank at most two, with evidence for a broader extension. This turned an optimization over pure-state decompositions into a practical calculation for an important class of small quantum systems.[ref]