2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/92453We present a new linear-depth ripple-carry quantum addition circuit. Previous addition circuits required linearly many ancillary qubits; our new adder uses only a single ancillary qubit. Also, our circuit has lower depth and fewer gates than previous ripple-carry adders.9 pages, 7 figuresQuantum Physicstext