On quantum logical gate based on ESR (Analytical Study of Quantum Information and Related Fields)
Masanori Ohya, Igor Vasil'evich Volovich, Noboru Watanabe · Institutional Repositories DataBase (IRDB) · 2001
In classical computer, there exist inevitable demerits for discussing log- ical gates.One of the demerits is an irreversibility of logical gates, that is the AND and the OR gates.This property causes to the restriction of computtional speed for the classical computer.$\mathrm{T}\mathrm{h}\dot{\mathrm{e}}$ re are several kind of ap- proaches for avoiding these demetits.One of these approaches is proposed by Feynman [1].He proved that every logical gates can be contructed by combining with only two reversible gates, i.e., the NOT and the Controlled NOT (CNOT) gates.By the way, there are several approaches for realizing quantum logical gates.One of those approaches is the study by means of a nuclear magnetic 1