Kvantiniai NOT vartai
Kvantiniai NOT vartai – kvantiniai vartai, naudojami kvantiniuose kompiuteriuose, kurie kubito reikšmę pakeičia į priešingą. Šie vartai turi analogiškus klasikinius loginius NOT vartus. Kvantiniai NOT vartai žymimi X ženklu, įrašytu kvadrate. X1=0; X0=1. X 1 2 ( | 0 ⟩ + | 1 ⟩ ) = 1 2 ( | 0 ⟩ + | 1 ⟩ ) {\displaystyle X{\frac {1}{\sqrt {2}}}(|0\rangle +|1\rangle )={\frac {1}{\sqrt {2}}}(|0\rangle +|1\rangle )} . X 1 2 ( | 0 ⟩ − | 1 ⟩ ) = 1 2 ( − | 0 ⟩ + | 1 ⟩ ) = − 1 2 ( | 0 ⟩ − | 1 ⟩ ) {\displaystyle X{\frac {1}{\sqrt {2}}}(|0\rangle -|1\rangle )={\frac {1}{\sqrt {2}}}(-|0\rangle +|1\rangle )=-{\frac {1}{\sqrt {2}}}(|0\rangle -|1\rangle )} . | 0 ⟩ | 0 ⟩ → | 0 ⟩ 1 2 ( | 0 ⟩ + | 1 ⟩ ) → | 0 ⟩ 1 2 ( | 0 ⟩ + | 1 ⟩ ) → | 0 ⟩ | 0 ⟩ , {\displaystyle |0\rangle |0\rangle \to |0\rangle {1 \over {\sqrt {2}}}(|0\rangle +|1\rangle )\to |0\rangle {1 \over {\sqrt {2}}}(|0\rangle +|1\rangle )\to |0\rangle |0\rangle ,} | 0 ⟩ | 1 ⟩ → | 0 ⟩ 1 2 ( | 0 ⟩ − | 1 ⟩ ) → | 0 ⟩ 1 2 ( | 0 ⟩ − | 1 ⟩ ) → | 0 ⟩ | 1 ⟩ , {\displaystyle |0\rangle |1\rangle \to |0\rangle {1 \over {\sqrt {2}}}(|0\rangle -|1\rangle )\to |0\rangle {1 \over {\sqrt {2}}}(|0\rangle -|1\rangle )\to |0\rangle |1\rangle ,} | 1 ⟩ | 0 ⟩ → | 1 ⟩ 1 2 ( | 0 ⟩ + i | 1 ⟩ ) → | 1 ⟩ 1 2 ( | 0 ⟩ + i 2 | 1 ⟩ ) = | 1 ⟩ 1 2 ( | 0 ⟩ − | 1 ⟩ ) → | 1 ⟩ | 1 ⟩ , {\displaystyle |1\rangle |0\rangle \to |1\rangle {1 \over {\sqrt {2}}}(|0\rangle +i|1\rangle )\to |1\rangle {1 \over {\sqrt {2}}}(|0\rangle +i^{2}|1\rangle )=|1\rangle {1 \over {\sqrt {2}}}(|0\rangle -|1\rangle )\to |1\rangle |1\rangle ,} | 1 ⟩ | 1 ⟩ → | 1 ⟩ 1 2 ( | 0 ⟩ − i | 1 ⟩ ) → | 1 ⟩ 1 2 ( | 0 ⟩ − i 2 | 1 ⟩ ) → | 1 ⟩ | 0 ⟩ . {\displaystyle |1\rangle |1\rangle \to |1\rangle {1 \over {\sqrt {2}}}(|0\rangle -i|1\rangle )\to |1\rangle {1 \over {\sqrt {2}}}(|0\rangle -i^{2}|1\rangle )\to |1\rangle |0\rangle .}