Posted by qwerty on Monday, March 11, 2013 at 11:15pm.
Suppose we are given a single qubit which is either in the state |u> = cos(pi/8) |0> + sin(pi/8) |1> or |v> = cos(3pi/8) |0> + sin(3pi/8) |1>. We measure this qubit in the standard basis and guess u if the outcome is 0 and guess v if the outcome is 1.
(a) What is the probability that you guess right?
(b) Is there a measurement which is correct more often?
- Quantum Physics - helpman, Wednesday, March 13, 2013 at 9:56am
- Quantum Physics - willie wonka, Thursday, March 14, 2013 at 2:03pm
- Quantum Physics - Any, Thursday, March 14, 2013 at 4:55pm
a) What quantum state do you have to input in order to get output |00⟩ ?
b) What quantum state do you have to input in order to get output |11⟩ ?
- Quantum Physics - Tuma, Thursday, March 14, 2013 at 5:10pm
(c) What quantum state do you have to input in order to get output 1/2ã(|00⟩+|11⟩)?
- Quantum Physics - Gina, Friday, March 15, 2013 at 2:19pm
- Quantum Physics - Anonymous, Sunday, March 17, 2013 at 2:44pm
u are all cheaters on the exam and will be reported.
- Quantum Physics - helpful, Monday, March 18, 2013 at 2:57am
lolol at Anonymous
- Quantum Physics - Anonymous, Monday, March 18, 2013 at 5:07am
:D im glad someone has a sense of humour..
- Quantum Physics - Don, Monday, March 18, 2013 at 5:30pm
If the first qubit is in the state 2/sqrt(5)|0> - 1/sqrt(5)|1> and the second qubit is in the state 1/sqrt(2)|0> - i/sqrt(2)|1>, what is the state of the composite system?
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