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Gates in quantum computing

  1. Jan 17, 2010 #1
    1. The problem statement, all variables and given/known data
    I'm trying to show that controlled-not gate can not be used to make toffolit gate(controlled-controlled not gate)


    2. Relevant equations



    3. The attempt at a solution
    i'm thinking that controlled not only has +(addition modulo 2) of the inputs, it cant make X and Y for input X,Y
    hence cannot make function XY+Z

    but I'm not sure if this is right, and I don't know how else to go about this problem.

    thanks
     
  2. jcsd
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