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What is Quantum Computing Problem Set Solutions about?

1. A qubit is in the state |ψ⟩ = 1/√2|0⟩ + i/√2|1⟩. The probabilities of measuring 0 and 1 are both 1/2. Writing the state in the |+⟩,|−⟩ basis gives |ψ⟩ = 1/√2|+⟩ + i/√2|−⟩. 2. The matrix U performs a rotation on the qubit. U is unitary as UU† = I. Applying U twice rotates the state back to the original. U can be written as U = (1/√2)I +

Author

Lidia Artiom

Language

EN