Posted by Bel on Friday, March 15, 2013 at 12:58pm.
I.Provide a unitary that maps +> to 1> and > to 0> . Enter 0 in all boxes if no such unitary exists. (In this case, you have to enter 0 explicitly. Blanks are not accepted.)
a b
c d
II.Provide a unitary that maps cos (30) 0> + sin (30) 1> to cos(15) 0> + sin(15) 1> and cos(5) 0> + sin(5) 1> to cos(40) 0> + sin(40) 1> . Enter 0 in all boxes if no such unitary exists.
a b
c d

Quantum Physics  Gina, Friday, March 15, 2013 at 2:13pm
Helpppp

Quantum Physics  helper, Sunday, March 17, 2013 at 2:25pm
1/sqrt(2) 1/sqrt(2)
1/sqrt(2) 1/sqrt(2)

Quantum Physics  Lumen, Sunday, March 17, 2013 at 2:30pm
Thanks helper, any answer for the second? Thanks

Quantum Physics  Gyano, Sunday, March 17, 2013 at 3:48pm
I. Is wrong?

Quantum Physics  none of your goddamn business, Monday, March 18, 2013 at 11:47am
I have got all the rest of the answers correct.. this I couldn't muster.
What is the matrix for Z⊗X (Z applied on the first qubit and X applied on the second qubit)? provide directions, hints, solution ;)

Quantum Physics  Quantum Physics, Monday, March 18, 2013 at 11:58am
0,1,0,0
1,0,0,0
0,0,0,1
0,0,1,0

Quantum Physics  none of your goddamn business, Monday, March 18, 2013 at 12:01pm
thanks.. got it. 2 entries were wrong in mine. thanks a ton.. 100 % in the midterm. YAAAAAY !!!

Quantum Physics  Gyano, Monday, March 18, 2013 at 12:53pm
matrix is wrong??

Quantum Physics  Anonymous, Monday, March 18, 2013 at 10:30pm
How about No 9a? What is the probability?

Quantum Physics  lana, Tuesday, March 19, 2013 at 12:41am
problem 8? pleaseee
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