Fundamentals

1.1
What is quantum?
6 min
1.2
Measurement and superposition
6 min
1.3
What is a qubit?
6 min
1.4
The math behind a qubit
10 min
1.5
What is quantum entanglement?
8 min
1.6
No-signaling
7 min

Chapter 2

Experiments and Paradoxes

2.1
The Bell Paradox
5 min
2.2
BB84: how to share a quantum secret
12 min
2.3
Ekert91 (E91)
6 min
2.4
Superdense coding
Coming soon
2.5
Impossibility of quantum bit commitment
7 min

Chapter 3

Quantum Computing

3.1
What can quantum computing do?
7 min
3.2
Deutsch's algorithm
Coming soon
3.3
What is a quantum gate?
6 min
3.4
What is fidelity?
5 min
3.5
Grover's algorithm
Coming soon

Concepts & reference

Gates, operations, and the glossary

Short visual explainers for each gate (one interactive Bloch-sphere demo each), plus the operations reference and the glossary of quantum-computing terms.

Hadamard gate
Puts a qubit into superposition. The most-used gate in quantum computing.
Pauli-X gate
The quantum NOT. Flips |0⟩ ↔ |1⟩.
Pauli-Y gate
A 180° rotation about the y-axis with an added phase.
Pauli-Z gate
The phase flip. Invisible in the z-basis.
T gate
A 45° phase rotation. The third gate in the universal set.
CNOT gate
Two-qubit gate that creates entanglement. A quantum if-statement.
Quantum measurement
Collapses a qubit to one of two outcomes along the axis you pick.
Glossary
Plain-language definitions for the terms you keep running into.

Read the course. Then hold the qubits.

Get your model qubits