Courses
The skills in the Qourse quantum computing course: Foundations, Superposition, Measurement, Single-qubit gates, Phase, Many qubits, Entanglement, Multi-qubit…
Foundations
Beginner · 5 lessons · 23 activities
What makes quantum computing genuinely different from the computer on your desk, why the physics behaves the way it does, and how a real quantum processor fits into a machine that's mostly refrigeration and control electronics.
Superposition
Beginner · 5 lessons · 18 activities
A qubit's state is two signed numbers, not one unknown bit. Read them off the Bloch circle, write them as a|0⟩ + b|1⟩ with |a|² + |b|² = 1, and run the experiment that tells a superposition apart from a coin flip nobody has looked at.
Measurement
Beginner · 1 lesson · 5 activities
What a measurement actually does: how amplitudes become odds, why a superposition is not a coin already flipped, how the basis you choose changes the question you ask, and why a run of shots never lands exactly on the odds.
Single-qubit gates
Beginner · 4 lessons · 18 activities
A gate is a reversible rotation of a state, not a truth table. Meet X and H, learn to read a circuit left to right as a sequence of time slices, and practise reaching a state you were handed rather than pushing symbols around.
Phase
Intermediate · 4 lessons · 17 activities
The half-turn no single measurement can see: where relative phase hides, why global phase is unobservable, the gates that turn it (Z, S, T and the rotations) — and the Bloch sphere, introduced here because this is where a third axis finally has a job to do.
Many qubits
Intermediate · 1 lesson · 5 activities
What changes when one qubit becomes several: outcomes multiply rather than add, bit order starts to matter, measuring one qubit reshapes the rest, and the Bloch sphere stops being able to show you the state at all.
Entanglement
Intermediate · 1 lesson · 5 activities
The states that cannot be pulled apart into two independent qubits: how to spot one, what its measurement correlations look like, why correlation is not influence, and why entanglement comes in degrees rather than all-or-nothing.
Multi-qubit gates
Intermediate · 1 lesson · 5 activities
The gate that makes qubits interact. How CNOT behaves on definite inputs, why it stops looking classical the moment its control is in superposition, and how two gates in sequence build the entanglement everything else depends on.
Notation and real machines
Intermediate · 1 lesson · 5 activities
Reading and writing quantum computing as practitioners do: Dirac notation without hand-waving, gates as the matrices they are, a real Qiskit circuit line by line, and what a histogram from actual hardware looks like when it comes back imperfect.
Inside Quantum Hardware
Beginner · 7 lessons · 14 activities
Explore seven parts of a superconducting quantum computer, then learn how each works through its own Read & Apply lessons.