Lower Bound on the Number of Toffoli Gates in a Classical Reversible Circuit through Quantum Information Concepts
Sandu Popescu, Berry Groisman, Serge Massar · Physical Review Letters · 2005
The question of finding a lower bound on the number of Toffoli gates in a classical reversible circuit is addressed. A method based on quantum information concepts is proposed. The method involves solely concepts from quantum information--there is no need for an actual physical quantum computer. The method is illustrated in the example of classical Shannon data compression.