量子幺正操作

机密信息

U 0 = I = | H H | + | V V |

“00”

U 1 = σ z = | H H | | V V |

“01”

U 2 = σ x = | H V | + | V H |

“10”

U 3 = i σ y = | H V | | V H |

“11”