QTM101 · Why Quantum Computing Matters
About Course
A clear, hype-free introduction to what quantum computers are, what problems they may solve better than classical computers, where the technology stands in 2026 and why organizations should already care about post-quantum security.
Who it is for
Professionals, managers and students with no physics background who want to understand quantum computing well enough to discuss it sensibly.
Prerequisites
None; basic computer literacy is enough.
What you will be able to do
- Explain in plain language how a quantum computer differs from a classical computer
- Identify the problem types where quantum advantage is expected and those where it is not
- Describe the main hardware approaches and the role of error correction in current roadmaps
- Explain the "harvest now, decrypt later" risk and why post-quantum cryptography matters today
Lessons
- Lesson 1 · What a quantum computer is
- Lesson 2 · Where quantum computing could help, and where it will not
- Lesson 3 · The state of the field and the security clock
- Lesson 4 · Lab and assignment
Lab: Your first quantum circuit in a browser simulator
You drag gates onto a visual circuit and watch the probabilities of measurement outcomes change in real time. You compare a classical bit flip with a Hadamard gate that creates an equal superposition, then link two qubits so their results always match. You record what you observe in a short worksheet.
Free tools: Quirk (free, browser-based quantum circuit simulator; no account needed)
Assessed assignment
Write a two-page briefing note for the leadership of a mid-sized organization of your choice (a regional bank, a logistics company or a hospital network) titled "What quantum computing means for us". Explain the technology in plain language, list two areas where it might eventually help the organization and two common myths. Describe the cryptographic risk and recommend three practical first steps for the next 12 months. Cite at least three reputable sources, such as NIST, a national cybersecurity agency or peer-reviewed reporting.
| Criterion | Weight | What excellent work looks like |
|---|---|---|
| Accuracy and clarity | 30% | Explains qubits, superposition and the current state of hardware correctly and without jargon or hype. |
| Relevance to the organization | 25% | Opportunities and myths are specific to the chosen sector and realistic about timelines. |
| Security risk and next steps | 30% | Explains harvest-now-decrypt-later and gives concrete, feasible first steps such as a cryptographic inventory. |
| Sources | 15% | Uses at least three credible, current sources and cites them clearly. |
Portfolio piece
A two-page executive briefing on quantum computing opportunities and risks for a specific organization.
Next step
Continue with QTM102 · The Math You Need: Vectors, Matrices and Probability · 4 hours · $28.00
Course Content
QTM101 · Why Quantum Computing Matters (4 h)
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Lesson 1 · What a quantum computer is
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Lesson 2 · Where quantum computing could help, and where it will not
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Lesson 3 · The state of the field and the security clock
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Lesson 4 · Lab and assignment
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QTM101 Assessment · Why Quantum Computing Matters