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10 videos · 4 h 43 min
Explainer · YouTube
3Blue1Brown
Grant Sanderson treats a quantum state as a vector, gates as rotations, and Grover's search as a sequence of reflections, and confronts the 'tries every answer at once' myth directly. Best watched after Part 6; the rotation picture there is exactly the geometry behind the square-root speed-up.
Explainer · YouTube
minutephysics
A hand-drawn walk through Shor's algorithm: how factoring turns into finding a period, and how a quantum Fourier transform makes the wrong periods interfere away. A natural companion to Part 6 and a bridge to next session's cryptography.
Explainer · YouTube
Josh's Channel
An eight-minute explainer that starts from classical bits, introduces the Hadamard gate (1:20), asks what happens when you measure between two H gates (4:25), then recasts every gate as a rotation of the Bloch sphere (5:43). Watch the 4:25 segment beside this section's H-then-H calculation: it is where interference between the two Hadamards meets measurement.
Explainer · YouTube
Michael Nielsen
Ten minutes on the controlled-NOT gate from Michael Nielsen, co-author with Isaac Chuang of the field's standard textbook, taken from his series 'Quantum computing for the determined'. Afterwards, build this section's Bell state yourself: H on the control, then CNOT.
Explainer · YouTube
Domain of Science
Dominic Walliman's quick tour of five common errors opens at 0:30 with the 'parallel computing' myth this section takes apart. It then previews the rest of the lesson: logical versus physical qubits (1:28), encryption (3:10), noise (4:05) and quantum supremacy (5:03). It dates from 2018, so its supremacy segment comes before Google's 2019 claim and the Willow results of Part 8.
Explainer · YouTube
Domain of Science
Starts at the 24:59 chapter, 'Obstacles to Building a Quantum Computer', the problem this section opens with. Then comes 'What Real Quantum Computers Are Made From' (27:24), Dominic Walliman's beginner-level tour of the competing hardware, to set beside this section's five families. It dates from 2022, so trust the section's newer figures; the first 24 minutes are a map of the whole field if you want more.
Lecture · Perimeter
Perimeter Institute for Theoretical Physics · Shohini Ghose · 2020
Physicist Shohini Ghose of Wilfrid Laurier University surveys the quantum technologies that grow out of superposition and entanglement, from quantum computers to secure communication. A clear public lecture given at Perimeter Institute in March 2020.
Lecture · Nobel Prize
Nobel Prize · John Clarke · 2025
"From SLUGs to macroscopic quantum phenomena": John Clarke on the 1984–85 Berkeley experiments in which an entire superconducting circuit, big enough to hold in your hand, tunnelled out of a trapped state as a single quantum object.
Lecture · Nobel Prize
Nobel Prize · Michel H. Devoret · 2025
"From macroscopic quantum phenomena to artificial atoms": Michel Devoret on how a circuit's quantized energy levels — measured in the same experiments — became the foundation of today's superconducting qubits.
Lecture · Nobel Prize
Nobel Prize · John M. Martinis · 2025
"Prehistoric Superconducting Qubits": John Martinis, who later led Google's quantum-hardware team, traces the line from the 1980s tunnelling experiments to the superconducting qubit.