measurement

page_type	languages	products	description	urlFragment
sample	qsharp	qdk	This sample demonstrates the use of measurement operations to measure one or more qubits.	measuring-qubits

Measuring Qubits

This sample demonstrates:

• The use of measurement operations to measure one or more qubits, getting classical data back that can be used in classical logic.
• How to use assertions to build tests for expected behaviour of operations that involve measurements.
• Resetting previously allocated qubits.

In Q#, the most basic measurement operation is the M operation, which measures a single qubit in the computational basis (sometimes also called the 𝑍-basis). In this sample, we show how M can be used to sample random numbers, and to measure registers of qubits.

Prerequisites

• The Microsoft Quantum Development Kit.

Running the Sample

To run the sample, use the dotnet run command from your terminal.

Manifest

• Measurement.qs: Q# code preparing and measuring a few qubits.
• Measurement.csproj: Main Q# project for the sample.

Further resources

• Measurement concepts
• Facts and assertion techniques