by Hui Wai Kit · May 2026

You Are A Qubit.

An interactive journey into quantum computing

Click anywhere to begin

The Classical World

You are a bit.

Classical computers solve problems one combination at a time — brute force. Three switches, one correct combination. Find it.

🔒
A
0
B
0
C
0

Answer:

This is brute force. One combination at a time. For 3 switches: up to 8 tries. For 300 switches: 2³⁰⁰ tries. The universe would end first.

Quantum Advantage

Now watch quantum.

Same 3-switch problem. A quantum computer holds all 8 combinations simultaneously — not one at a time.

8 states — alive at once

Principle I — Superposition

How did all 8 light up at once?

A classical bit is 0 or 1 — locked in. A qubit holds both simultaneously, like a coin spinning in the air — genuinely heads and tails until the moment it lands. That's how 3 qubits held all 8 combinations at once. Observe the coin to collapse it.

Principle II — Interference

Why did only |101⟩ survive?

All 8 existed. But wrong answers are engineered to destroy each other — the correct path has nothing to cancel against. It survives.

Every wrong answer is paired with its mathematical mirror — by design. They collide and cancel each other to zero. This is destructive interference, engineered into the algorithm. The right answer has no mirror. Nothing to cancel against. It survives untouched — and when you measure, it's the only thing left.

Real World Impact

Three Problems. No Classical Solution.

The 300-Stock Problem

2300
possible portfolios
classical time to solve
vs
1
quantum operation

📊 Classical

🔢
Test sequentially. One combination at a time — best return, lowest risk, check constraints.
2³⁰⁰ combinations. More than atoms in the universe. Takes longer than the universe has existed.
🎲
Forced to approximate. Heuristics and shortcuts. Never guaranteed optimal.
Best guess. Not the answer.

⚛️ Quantum

🌐
Superposition. 300 qubits hold all 2³⁰⁰ portfolios simultaneously — no sequential testing.
💥
Interference. Underperforming allocations cancel each other. Optimal allocation amplifies.
🎯
Single measurement. Collapse returns the best portfolio. Mathematically guaranteed.
The answer. Not an approximation.

Goldman Sachs, JPMorgan, HSBC — already running quantum portfolio experiments. The edge isn't marginal. It's a different class of problem.

Quantum Key Distribution (QKD)

Classical encryption hides data behind a mathematical key — like locking it in a safe. The problem: if someone intercepts your key in transit, they can copy it silently and you'd never know.

Classical
Alice
🔑
Bob
key stolen ✗
Eve intercepts the key, makes a silent copy, and forwards it. Alice and Bob never know.
Quantum
Alice
🕵 Eve
Bob
tamper detected ✓
Eve must observe photons to intercept them. Observation collapses quantum states ⚡ — key is destroyed. Alice and Bob detect the disturbance.

Eavesdropping leaves evidence in the laws of physics. China's Micius satellite already demonstrated this over 1,200km. Governments are mandating migration now.

Navigating Without GPS

GPS doesn't work underwater. So how do submarines navigate today — and why is that a problem?

🔊 Today: Acoustic

📡
Emit sonar pings to measure position. Every ping is detectable.
👂
Anyone listening can triangulate your location instantly.
🎯
Strategic liability. Stealth submarines that aren't actually stealthy.
You reveal your position just by navigating.

⚛️ Quantum: Gravity Sensing

🌍
Earth's gravity varies with terrain — mountains, trenches, ridges all leave a unique fingerprint.
⚛️
Quantum gravimeters detect gravity changes of 1 part in 10¹¹. Match against pre-mapped seafloor.
🤫
Zero emissions. No pings, no signals. Navigate by listening to the planet itself.
Completely undetectable. UK, US, China all building this now.

The Stakes

This Isn't Future Tech.

Three reasons quantum is a commercial priority today, not a research curiosity.

1

The Cryptography Deadline

Every government, bank, and hospital uses encryption that quantum computers will eventually crack. NIST finalised post-quantum cryptography standards in 2024. Organisations not yet migrating are already behind. The window is measured in years.

2

Quantum Sensing Is Already Deployed

You don't need a fault-tolerant quantum computer for quantum advantage. Quantum sensors are operating now — underground mapping, gravity surveys, navigation, medical imaging. The market doesn't wait for perfect qubits.

3

The Explainability Gap Is The Opportunity

Quantum has brilliant physicists and almost no one who can explain it to a buyer, a board, or a minister. The commercial gap is a product and GTM gap. That's rare — and it's open right now.