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10 videos · 6 h 59 min
Lecture · Yale
Yale University · Steve Girvin
Yale physicist Steve Girvin gives a full lecture on secure communication with the BB84 key-distribution protocol, motivated by the threat quantum computing poses to today's encryption. Watch it after Part 3, with the 25 percent error fingerprint and the (3/4)ⁿ odds of Eve slipping through in hand as a check on the eavesdropping argument.
Lecture · Caltech
John Preskill · 2021
The lecture from Caltech Ph/CS 219A Quantum Computation (John Preskill, 2021) that goes with Chapter 24. The whole course is in the Lecture Hall.
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 · IBM Quantum
Qiskit · John Watrous · 2022–25
The lecture from IBM Quantum Understanding Quantum Information & Computation (John Watrous, 2022–25) that goes with Chapter 20. The whole course is in the Lecture Hall.
Lecture · Nobel Prize
Nobel Prize · Anton Zeilinger · 2022
"A Voyage through Quantum Wonderland": Anton Zeilinger on quantum teleportation, entanglement swapping and loophole-free Bell tests, told by the physicist whose group performed many of those experiments.
Explainer · YouTube
Up and Atom
Jade introduces quantum key distribution, the simplest form of quantum cryptography, and shows why an eavesdropper cannot read the key without disturbing it: the idea behind the BB84 protocol of Parts 2 and 3 and today's Spy Hunt lab. When the video calls the scheme unbreakable, keep the lesson's fine print in mind: secure in principle, but only as good as its hardware and its authenticated channel.
Explainer · YouTube
minutephysics
A hand-drawn derivation of the complete teleportation protocol: a shared Bell pair, Alice's joint measurement, two classical bits and Bob's correction. Watch it after Part 4 and compare its four cases with the teleportation identity among today's key equations; notice that only the state travels, and only as fast as the two bits.
Lecture · Royal Institution
The Royal Institution
NPL's chief scientist, JT Janssen, explains how atomic magnetometers sense magnetic fields and how atom interferometers measure gravity, acceleration and rotation, including NPL's work on gravimeters based on a double rubidium atomic fountain: the sensors of Part 6, from the laboratory that built the first practical caesium clock. A long but rewarding lecture on fragile quantum states turned into precision tools.
Explainer · YouTube
minutephysics
A hand-drawn proof built step by step from superpositions, composite systems and linear transformations, then a cloning machine fed a superposition (4:55) and the proof by contradiction (6:14): the same linearity argument as Part 1. The closing section on teleportation (7:56) points ahead to Part 4.