Concept Explorer
Foundations, states, operators and quantum information
Open laboratory →Explore. Experiment.
Understand quantum.
Ten interactive learning environments, an original 20-chapter course, and a 126-question quiz arena—bundled into one offline-friendly static website.
10 connected learning laboratories
Algorithm Visualizer
Walk through quantum circuits and amplitude changes
Open laboratory →Phenomena Lab
Interference, tunneling and wave packets
Open laboratory →Mathematics Playground
Complex amplitudes, tensor products and operators
Open laboratory →Hardware Atlas
Qubit technologies, controls and readout
Open laboratory →Thought Experiment Museum
Bell, EPR, cat, no-cloning and more
Open laboratory →Programming Dojo
Qiskit challenges and code walkthroughs
Open laboratory →Communication Studio
BB84, teleportation and superdense coding
Open laboratory →Knowledge Graph
Explore prerequisite connections
Open laboratory →Research Sandbox
Noise, VQE and open-system toy models
Open laboratory →Continue your journey
Quantum Computing Open Course
20 chapters of independently written mathematical and algorithmic foundations, with code examples.
Read chapters →Quantum Quiz Mania
126 questions across 24 topics, with timed challenges, explanations, and progress tracking.
Take a quiz →Learn → Simulate → Code → Assess
Follow prerequisites, test a physical model, inspect Qiskit snippets, and reinforce knowledge with a quiz.
Explore knowledge graph →No accounts, analytics, backend, or external network connection required. Numerical visualizations are educational toy models; Qiskit scripts are for local Python execution.
⊗ Circuit walkthrough: entanglement and measurement
The Hadamard gate prepares (|0⟩ + |1⟩)/√2 on the first qubit. The controlled-NOT then creates the Bell state (|00⟩ + |11⟩)/√2. Measuring both qubits in the computational basis produces correlated 00 and 11 outcomes, each with ideal probability 1/2. This example illustrates a circuit building block; it is not a complete implementation of the surrounding algorithm.
Show runnable Qiskit example
from qiskit import QuantumCircuit
from qiskit_aer import AerSimulator
qc = QuantumCircuit(2, 2)
qc.h(0) # Superpose the first qubit
qc.cx(0, 1) # Entangle both qubits
qc.measure([0, 1], [0, 1])
print(qc.draw(output="text"))
result = AerSimulator().run(qc, shots=1024).result()
print(result.get_counts()) # Approximately 00 and 11
Install qiskit and qiskit-aer locally to execute this code. The diagram is a static circuit illustration, not a browser-based simulator.