Quantum something or other

  • Thread starter Dragonfall
  • Start date
  • #1
1,030
4

Main Question or Discussion Point

Suppose [tex]\mathbf{U}_f(\left| x\right>\left| y\right> )=\left| x\right>\left| y\oplus f(x)\right>[/tex] denotes the unitary transformation corresponding to some 1-bit function f.

I'm guessing here that x is the input register, and y the output register.

Now suppose f(0)=0 and f(1)=0.

How is it that [tex]\mathbf{U}_f=\mathbf{1}[/tex] the 2-Qbit unit operator?
 
Last edited:

Answers and Replies

  • #2
1,030
4
In general, is [tex]\left| x\right>\left| y\right>[/tex] a tensor product?
 
  • #3
246
1
don't know about your first question but in general [tex]\left| x\right>\left| y\right>[/tex]
means tensor product, we are just too lazy to write it.
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
41,793
922
It might be better to post this under "quantum mechanics".
 

Related Threads for: Quantum something or other

Replies
5
Views
580
Replies
1
Views
1K
Replies
7
Views
2K
  • Last Post
Replies
11
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
6
Views
2K
Top