2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/145245A simple proof of quantum adiabatic theorem is provided. Quantum adiabatic approximation is divided into two kinds. For Hamiltonian H(t/T), a relation between the size of the error caused by quantum adiabatic approximation and the parameter T is given.10 pagesQuantum Physicstext