microsoft/qdk
Publicmirrored from https://github.com/microsoft/qdkAvailable
samples/getting_started/RandomBits.qs
36lines · modeblame
c97c05a1DmitryVasilevsky1 years ago | 1 | /// # Summary |
| 2 | /// Simple Quantum Random Number Generator sample | |
| 3 | /// | |
| 4 | /// # Description | |
| 5 | /// This program implements a quantum random number generator by setting qubits | |
| 6 | /// into superposition and then using the measurement results as random bits. | |
| 7 | /// This is equivalent to generating a random number in the range of 0..2ᴺ-1. | |
| 8 | operation Main() : Result[] { | |
| 9 | // Generate a 5-bit random number. | |
| 10 | GenerateNRandomBits(5) | |
| 11 | } | |
| 12 | | |
| 13 | /// # Summary | |
| 14 | /// Generates N random bits in the form of `Zero` or `One` results. | |
| 15 | operation GenerateNRandomBits(nBits : Int) : Result[] { | |
| 16 | // Array for the results | |
| 17 | mutable results = []; | |
| 18 | for _ in 1..nBits { | |
| 19 | // Append next random result to the array | |
| 20 | results += [GenerateRandomBit()]; | |
| 21 | } | |
| 22 | results | |
| 23 | } | |
| 24 | | |
| 25 | /// # Summary | |
| 26 | /// Generates a random bit in the form of `Zero` or `One` result. | |
| 27 | operation GenerateRandomBit() : Result { | |
| 28 | // Allocate a qubit | |
| 29 | use q = Qubit(); | |
| 30 | // Set the qubit into uniform superposition of |0〉 and |1〉 | |
| 31 | H(q); | |
| 32 | // Now the qubit has 50% chance of being measured as `One` | |
| 33 | // and 50% chance of being measured as `Zero`. | |
| 34 | // Measure and reset the qubit. Return the result. | |
| 35 | MResetZ(q) | |
| 36 | } |