microsoft/qdk
Publicmirrored fromhttps://github.com/microsoft/qdkAvailable
samples/algorithms/Measurement.qs
30lines · modecode
| 1 | /// # Sample |
| 2 | /// Measurement |
| 3 | /// |
| 4 | /// # Description |
| 5 | /// Quantum measurement is an irreversible operation in which a quantum system |
| 6 | /// is manipulated to yield a numerical result. Measuring a quantum system |
| 7 | /// generally changes the quantum state that describes that system. |
| 8 | /// |
| 9 | /// In Q#, the result of a measurement is a value of the type `Result`, that is, |
| 10 | /// `One` or `Zero`. |
| 11 | /// |
| 12 | /// This Q# program exemplifies different types of measurements. |
| 13 | namespace Sample { |
| 14 | open Microsoft.Quantum.Measurement; |
| 15 | @EntryPoint() |
| 16 | operation Main () : (Result, Result[]) { |
| 17 | // The `M` operation performs a measurement of a single qubit in the |
| 18 | // computational basis, also known as the Pauli Z basis. |
| 19 | use q = Qubit(); |
| 20 | let result = M(q); |
| 21 | Reset(q); |
| 22 | |
| 23 | // The `MeasureEachZ` operation measures each qubit in an array in the |
| 24 | // computational basis and returns an array of `Result` values. |
| 25 | use qs = Qubit[2]; |
| 26 | let results = MeasureEachZ(qs); |
| 27 | |
| 28 | return (result, results); |
| 29 | } |
| 30 | } |