Wednesday

September 17, 2014

September 17, 2014

Posted by **s** on Friday, April 19, 2013 at 5:31am.

Write M in the standard basis.

If M is the Hamiltonian acting on a qubit which is in the state |ψ(0)⟩=|0⟩ at time 0, what is the state of the qubit at time t? Assume that you are working in units such that ℏ=1. You may use e and t in your answer.

Now you perform an X=(0110) measurement on the qubit at time 0. What is the expected value of your measurement?

What if you perform the above measurement at time t=4π3 instead? What is the expected value of your measurement?

**Answer this Question**

**Related Questions**

physics - Consider the observable M that corresponds to a measurement in the ...

Quantum Physics - Consider the observable M that corresponds to a measurement in...

physics - Consider the state |ψ〉 = √2 |0〉 + √2 |1〉 from the previous...

Quantum Physics - Suppose that a qubit is in the state |ψ> = a |0>...

Physics - Alice and Bob share a state a|++⟩+b|−−⟩, ...

Physics - Suppose that a qubit is in the state |\phi\rangle=a|0\rangle+\sqrt{1-...

physics - Alice and Bob share a state a|++>+b|−−>, where the ...

Quantum Physics - Alice and Bob share a state a|++> + b|-->, where the ...

quantummechanics - The following circuit is designed for testing whether |u&#...

physics - Suppose that a qubit is in the state |φ〉 = a|0〉 + 1 − a2 |1〉 ...