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Course 2 · Practitioner · 60 min

Quantum Algorithms and the Qubit Math

How Shor and Grover actually work, what error correction costs, and how to read a resource estimate without being fooled.

  • Describe superposition, interference and measurement well enough to explain why quantum speed-ups are narrow
  • Trace the structure of Shor's algorithm from period finding to a factor
  • Explain why Grover's quadratic gain is weaker in practice than on paper
  • Convert a physical qubit count and error rate into a rough logical qubit budget
  • Critically read a published resource estimate for breaking RSA-2048

Full lessons are part of the bundle

This outline is free. The written lessons, quiz and hands-on activity unlock with the Quantum Encryption Course Bundle, which includes all six courses for $600.

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  1. 01Qubits, superposition and interference12 min
  2. 02Shor's algorithm end to end13 min
  3. 03Grover and the symmetric key question11 min
  4. 04Error correction and the resource budget12 min
  5. 05Reading a resource estimate critically12 min