Quantum Essentials · Module 4 · Chapter 16 of 17

How do you tell quantum hype from the real thing?

"Quantum" sells things: computers, shares, supplements, even jewellery. Some of those claims are true.

The short answer (tap to open)

Quantum technology is real, and so is the hype around it. To judge any claim, ask five questions: where's the paper, was it real hardware, compared with what, was the task useful, and has anyone independent checked it? Be most careful with "quantum" health products and investment adverts: regulators have found radioactive "quantum" pendants and fake "Quantum AI" trading schemes.

New here?

This page pulls together the media checks from every chapter. It works on its own, and links back to each topic.

Recap of chapter 11

No single approach is winning, because they lead on different things. Trapped ions lead on accuracy, superconducting circuits on speed and error-correction evidence, neutral atoms on scale. Early "quantum supremacy" claims were often matched later by ordinary computers. To judge any claim or roadmap, ask about error rates, logical qubits, independent checks and whether companies kept earlier promises.

Recap of chapter 14

Quantum sensors, clocks and random-number chips already do real jobs. Quantum computers so far beat ordinary ones only on test tasks chosen to suit them. Their strongest future use is simulating molecules and materials, which needs error-corrected machines expected around the 2030s. Claims about finance, machine learning and drug discovery remain unproven. Ask what evidence backs each claim.

Start with the introduction

Predict

Which of these has a regulator warned the public about?

After this page you can

explain why quantum attracts hype;
apply five questions to any quantum claim;
recognise the common hype patterns;
spot "quantum" products and scams, and know where to check.

Part A · Why quantum attracts hype

Why is there so much hype?

The science sounds mysterious. Most people can't check a quantum claim, so a confident claim goes unchallenged.
Money depends on attention. Start-ups need investors, listed companies need share prices, labs need grants and journalists need clicks.
The future is genuinely big. Real experts expect important uses (chapter 14). That makes exaggerated timelines easy to believe.
The word itself. "Quantum leap" already means "huge change" in everyday English, though in physics it's the smallest possible jump (chapter 1).

Hype runs both ways. "Quantum will never work" is as wrong as "quantum changes everything next year".

Part B · The five questions

What should you ask about any quantum claim?

Where's the paper? Is there a published, peer-reviewed study, or only a press release? A preprint is a start, not a finish.
Real hardware, or a simulation? Some "quantum" results ran on ordinary computers pretending to be quantum ones.
Compared with what? Ahead of the best ordinary method, or an old, slow one?
Useful or made-up? Does anyone need the answer?
Checked by others? Has an independent team tested it, or tried to beat it?

For hardware claims, add chapter 11's question: physical or logical qubits, and at what error rate?

Five questions for any quantum claim

Where's the paper? A 2025 speed-up claim came only as a press release. (What can quantum computers do today, and what's still to come?)
Real hardware, or a simulation? A "12% faster" result came from a simulated run. (What can quantum computers do today, and what's still to come?)
Compared with what? Google's 2019 "10,000 years" fell to days, then hours. (Which quantum computing approach is winning?)
Useful or made-up? Record sampling tasks have no known use. (Which quantum computing approach is winning?)
Checked by others? Majorana 1's own journal editors added a caution. (How do you build a qubit from light, silicon, Majoranas and annealers?)

For hardware claims, add: physical or logical qubits, and at what error rate?

The five questions, in a list

Where's the paper? A 2025 speed-up claim came only as a press release.
Real hardware, or a simulation? A "12% faster" result came from a simulated run.
Compared with what? Google's 2019 "10,000 years" fell to days, then hours.
Useful or made-up? Record sampling tasks have no known use.
Checked by others? Majorana 1's own journal editors added a caution.

For hardware claims, add: physical or logical qubits, and at what error rate?

Part C · Hype patterns you'll see again

What patterns repeat?

The moving goalpost. A "quantum beats supercomputers" claim, then ordinary methods catch up. Google's 2019 claim of 10,000 years fell to a few days, then hours (chapter 11, page 16a).
The giant extrapolation. In December 2022 a team factored a 48-bit number on 10 qubits and suggested 372 qubits might threaten RSA-2048. Experts found no evidence their method would scale (page 16a).
The simulated result. A claimed quantum speed-up that came from running the quantum method on an ordinary computer (chapter 14's blood-pump example).
The noise mistaken for signal. An improvement that may come from hardware errors, not quantum computing (chapter 14's bank-trading example).
The editor's footnote. Microsoft's 2025 Majorana 1 announcement came with a Nature paper whose editors noted it didn't show evidence for the key particles (chapter 10).
The company's own scoreboard. A benchmark only one company uses (chapter 11).

Pattern to example

The moving goalpost

The giant extrapolation

The simulated result

The noise mistaken for signal

The editor's footnote

The company's own scoreboard

Card 1 of 6

Google, 2019: 10,000 years for a supercomputer

The answers, in words

Google, 2019: 10,000 years for a supercomputer: The moving goalpost. IBM estimated days; by 2022 a team did it in about 15 hours on 512 GPUs.
10 qubits factor a 48-bit number; 372 qubits might threaten RSA-2048: The giant extrapolation. Experts found no evidence the method scales.
A blood-pump simulation "12% faster": The simulated result. The 12% came from running the quantum method on an ordinary computer.
Bond-trade predictions "up to 34%" better: The noise mistaken for signal. The gain appeared even against a noise-free simulation, which points to hardware noise.
Majorana 1, February 2025: The editor's footnote. Nature's editors noted the paper didn't show evidence for the key particles.
One company's "algorithmic qubits" record: The company's own scoreboard. A useful measure, but only one company uses it (chapter 11).

Part D · Quantum products and scams

What's "quantum healing"?

In 1989 the doctor and author Deepak Chopra published Quantum Healing, linking quantum physics to mind-body medicine. The phrase spread into a large wellness market of "quantum" therapies, devices and supplements. Physics gives no support for these claims: the quantum effects in this course appear in carefully isolated systems such as atoms, chips and very cold machines, and don't carry over to healing the body. In 2013 the UK's Advertising Standards Authority ruled that one company's claims about "quantum physics" improving health were misleading.

Can "quantum" products harm you?

Yes. In December 2021 the Dutch nuclear safety authority tested ten products, including a "quantum pendant", anti-5G pendants and "negative ion" jewellery, and found they gave off ionising radiation. It told owners to stop wearing them and banned their sale in the Netherlands.

What about "Quantum AI" investment adverts?

Fake adverts on social media promise huge returns from "quantum" trading software, often with deepfake videos of famous people such as Martin Lewis (Which?, July 2025). The UK's Financial Conduct Authority lists an unauthorised firm called "Quantum AI" on its warning list.

Protect yourself: no real quantum computer trades shares for the public. Check any investment firm on the FCA register before paying, and never invest through a social-media advert.

Real or red flag?

Real quantum technology

Real, but 'quantum' is marketing

Red flag

Card 1 of 10

A laptop with a "quantum dot" screen

The answers, in words

A laptop with a "quantum dot" screen: Real quantum technology. Real: quantum dots are nanocrystals whose colour comes from their size; they light TV and computer screens (Nobel Prize in Chemistry, 2023).
A "quantum energy" bracelet: Red flag. Red flag: no physics behind "quantum energy" jewellery.
A bank's post-quantum encryption: Real quantum technology. Real: new maths built because of quantum computers (chapter 13).
"Quantum AI: 90% monthly returns": Red flag. Red flag: the FCA lists an unauthorised firm called "Quantum AI" on its warning list.
A hospital's wearable brain scanner trial: Real quantum technology. Real: quantum magnetometers on a helmet (chapter 12).
A "quantum-charged" water bottle: Red flag. Red flag: "quantum" here is a marketing word with no physics behind it.
A phone with a quantum random-number chip: Real quantum technology. Real: on sale in South Korea since 2020.
"Quantum healing" sessions: Red flag. Red flag: physics gives no support; the ASA ruled against one company's "quantum physics" health claims (2013).
An "atomic clock" app: Real, but 'quantum' is marketing. Real, but 'quantum' is marketing: the app only reads time from atomic clocks elsewhere, over the internet.
A "quantum pendant": Red flag. Red flag: the Dutch nuclear regulator found such pendants gave off radiation (2021).

Can you score the headline?

1 / 8

Quantum computer performs in 200 seconds a task that would take a supercomputer 10,000 years (2019).

Paper?

Real hardware?

Compared with the best?

Useful?

Checked by others?

The headlines with their scores

Quantum computer performs in 200 seconds a task that would take a supercomputer 10,000 years (2019). The course's answers: 3 of 5. Ordinary methods matched it within a few years.
Just 372 qubits could break the encryption that protects the internet (2022). The course's answers: 2 of 5. Experts found no evidence the method scales.
Bank achieves world's first quantum-enabled trading (2025). The course's answers: 3 of 5. Experts argue the gain came from noise; a preprint, not peer reviewed.
Quantum computer speeds up engineering simulation by 12% (2025). The course's answers: 1 of 5. The 12% came from a simulated run, not the quantum hardware.
Microsoft creates a new state of matter for quantum computing (2025). The course's answers: 3 of 5. The journal's editors said the paper didn't show it; a 2026 critique followed.
Quantum computer measures an effect 13,000 times faster than a supercomputer (2025). The course's answers: 3 of 5. Peer reviewed and checkable; not yet reproduced by others with ordinary computers.
Quantum computer makes random numbers anyone can check (2025). The course's answers: 5 of 5. Peer reviewed in Nature; a narrow but real use.
New chip does in 5 minutes what would take 10 septillion years (2024). The course's answers: 2 of 5. A company estimate on a made-up task; it stands so far.

Myths and media

Media check

Right, half right or wrong? Call it first.

Card 1 of 3

"Just 372 qubits could break the encryption that protects the internet."

Check

Three quick ones

What's the best first question about a quantum speed-up claim?

Why should you be wary of "Quantum AI" trading adverts?

What happened to Google's 2019 "10,000 years" claim?

Collect

Your aha card

Real science, real hype.

Ask: where's the paper, real hardware, compared with what, useful, checked by others? Be wary of "quantum" health products and investment adverts.

Next page · Chapter 17

Can you explain quantum technology in your own words?

Go further

16a · Real-world caseFamous quantum hype stories, and what really happened
16b · A step deeperHow to read a quantum press release
16c · People storyScott Aaronson, the professor who became quantum computing's best-known hype checker

This page is for education only. It isn't investment, medical or legal advice. To check an investment firm, use the FCA register. Figures carry dates.