Community keynote - Quantum Computing: Mind-bogglingly weird!
summary
A Java simulator models single qubits with complex amplitudes, applies unitary gates as matrices, and shows how a Hadamard plus CNOT produces a Bell state (entangled qubits whose measurements match across distance). A polarizer filter demo makes interference visible; an IBM 5‑qubit chandelier illustrates cooling and engineering constraints. Shor is claimed to collapse classical factoring hardness (presented as a linear growth advantage on a quantum device). Practical obstacles: cryogenic cooling, decoherence, and exponential state-space growth. Java simulator polarizer filter demo
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chapters (27)
- 0:00Intro
- 0:39Things are not true
- 1:13Classical computers
- 1:58What does it solve
- 3:52General number field sieve
- 4:24Quantum mechanical phenomena
- 5:32Double slit experiment
- 6:49Light bulb
- 7:02Filter
- 7:12Horizontal
- 7:34Lego filter
- 9:35How to build a quantum computer
- 10:31Why dont we have quantum computers
- 11:16Quantum computer
- 11:34Mr Cubitt
- 12:14Cubes
- 12:53Cube probability
- 13:44Einstein
- 13:57Metarandom
- 14:24Gate
- 14:45Poly
- 16:33unitary gates
- 17:00measuring
- 17:39cat
- 18:24column computer
- 19:58bell state
- 20:45quantum entanglement
