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10 videos · 6 h 35 min
Lecture · Oxford
Artur Ekert
Nine minutes on the Bloch sphere from Artur Ekert's lecture course Introduction to Quantum Information Science, the video that goes with the Bloch-sphere section of the course's online book (qubit.guide). Watch how the polar angle θ (entering as θ/2) and the relative phase φ turn two complex amplitudes into one point on a globe. Then check this section's puzzle: orthogonal states sit 180° apart, not 90°.
Demo · Caltech
caltech
Two minutes inside Manuel Endres's lab at Caltech, where the team trapped 6,100 neutral-atom qubits in a grid made by lasers. This is the record array mentioned in this section. Hold this picture of optical tweezers in mind while you read about the other four hardware families.
Lecture · Caltech
John Preskill · 2021
The lecture from Caltech Ph/CS 219A Quantum Computation (John Preskill, 2021) that goes with Chapter 23. The whole course is in the Lecture Hall.
Lecture · Caltech
caltech · John Preskill · 2019
A sober account of what quantum computers can and cannot do: a closing keynote from June 2019, posted by Caltech, by the physicist who named the NISQ era. The best antidote to quantum hype you will find.
Course · Caltech
John Preskill · 2021
The graduate course from the physicist who coined the terms "quantum supremacy" and "NISQ": density operators, measurement, channels, Bell inequalities, teleportation, circuits, Shor's factoring, Grover's search and quantum simulation. Advanced, and worth every minute.
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.
Lecture · Nobel Prize
Nobel Prize · Serge Haroche & David J. Wineland · 2012
Serge Haroche on trapping photons in a box to watch the quantum-to-classical boundary — decoherence — in action, then David Wineland on superposition and entanglement with trapped ions. The experiments that turned thought experiments into laboratory routine.