Learn QISKIT with Real Code Examples

Qiskit provides tools for creating quantum circuits, running experiments on IBM Quantum devices, and analyzing results.

It integrates quantum algorithms, simulation backends, and optimization routines in a single framework.

Qiskit abstracts complex quantum hardware details while enabling low-level control when needed.

Quantum circuit building using `QuantumCircuit`

Execution via `Aer` simulator or real quantum backends

Measurement and state analysis tools

Pulse-level control for advanced users

Qiskit libraries for chemistry, finance, and optimization

Qubit: Fundamental quantum unit of information

Quantum Circuit: Sequence of quantum gates applied to qubits

Gate: Quantum operation like X, H, or CNOT

Measurement: Operation to extract classical bits from qubits

Backend: Simulator or real quantum device executing the circuit

Notebooks/ - quantum experiments and tutorials

Circuits/ - custom quantum circuit definitions

Simulations/ - backend simulations and results

Data/ - measurement results and analysis

Scripts/ - utility and automation scripts

Import Qiskit and initialize quantum circuit

Add qubits and classical bits to the circuit

Apply quantum gates to manipulate qubit states

Measure qubits to extract classical outcomes

Execute circuit on simulator or IBM Quantum device

Beginner: simulate basic quantum gates and circuits

Intermediate: design small algorithms (Grover, Bernstein-Vazirani)

Advanced: quantum chemistry simulations or optimization

Expert: pulse-level quantum programming and noise mitigation

Enterprise: integrate quantum workflows with classical systems

Qiskit vs Cirq: Qiskit integrates IBM devices; Cirq targets Google hardware

Qiskit vs Pennylane: Qiskit is full-stack; Pennylane focuses on quantum ML

Qiskit vs ProjectQ: Qiskit has broader ecosystem and libraries

Qiskit vs Braket: Braket supports multiple cloud providers; Qiskit focuses on IBM

Qiskit vs PyQuil: PyQuil targets Rigetti hardware; Qiskit targets IBM Q

2017 – Initial Qiskit release by IBM Research

2018 – Qiskit Aer simulator introduced

2019 – Qiskit Aqua library for algorithms and applications

2020 – Modular restructuring: Terra, Aer, Ignis, Aqua

2023 – Qiskit Optimization and Machine Learning libraries enhanced

Qubit: fundamental unit of quantum information

Gate: quantum operation on qubits

Circuit: sequence of quantum gates

Backend: simulator or real quantum device

Measurement: extraction of classical results from qubits