Practical aspects of quantum computing

Abstract

The article demonstrates how to practically "get a feel" for quantum computing in teaching without delving deeply into theory. Using a simple two-qubit circuit (Hadamard + CNOT), it explains superposition, entanglement, and the probabilistic nature of measurement, while also providing analytical calculations of the results to check understanding. It then provides step-by-step instructions for implementing the same circuit in Python (Qiskit), first on an ideal simulator and then on real IBM hardware, where noise and error rates are explicitly manifested as a didactically valuable contrast. It also includes brief instructions on setting up access (instance, API key).