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10 videos · 4 h 16 min
Course · IBM Quantum
Qiskit · John Watrous · 2022–25
The clearest modern course on quantum information, from IBM Quantum's John Watrous: single and multiple systems, circuits, teleportation and superdense coding, Shor's and Grover's algorithms, density matrices and error correction. Mathematically honest without being heavy.
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.
Series · Royal Institution
The Royal Institution · Various speakers
Thirty evening talks from the Royal Institution's lecture theatre in London, where Faraday once lectured: quantum fields, quantum biology, sensors, the quantum internet and the meaning of it all. Pick any one; each stands alone.
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 · Fermilab
Fermilab
Fermilab's Dr. Don Lincoln explains what the phrase 'quantum entanglement' means and how two objects can be linked by quantum effects. As you watch, keep two questions in mind: what exactly is correlated, and could anything in the setup carry a message? Part 5 of the lesson settles the second question with a two-line calculation.
Lecture · IQOQI Vienna
IQOQI Vienna · Christoph Lehner
An hour-long history-of-physics talk at Vienna's quantum-optics institute on Schrödinger's part in the making of the Einstein–Podolsky–Rosen paradox. Watch it after this section for the 1935 story at research depth, told from the side of the man who gave entanglement its name (Part 1).
Demo · IQOQI Vienna
IQOQI Vienna
Under two minutes from Vienna's IQOQI, accompanying the paper of the same title by Robert Fickler, Mario Krenn and colleagues: a camera that fires only when the partner photon is detected images entangled light in real time. Watch how the picture depends on the measurement made on the partner, and notice that it exists only in the coincidences, which is Part 5's point.
Explainer · JQI
JQInews
The Joint Quantum Institute introduces parametric down-conversion, 'a fascinating phenomenon with a forbidding name': a single photon enters a special crystal and two photons come out. Watch it before this section's energy bookkeeping, 1/λ_pump = 1/λ_signal + 1/λ_idler, which says where the parent photon's energy goes.
Explainer · Perimeter
Perimeter Institute for Theoretical Physics · Katie Mack · 2023
A short episode from Perimeter Institute's Quantum 101 series with Katie Mack. Watch it alongside Chapter 20.
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.