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Quantum for Everyone
Start with a light switch and a spinning coin. Switch to Student or Pro at any time to see the same idea in Dirac notation, or what it costs on real hardware.
Lesson 1 · 8 min
The Light Switch World
Everything your phone knows is made of tiny switches.
Lesson 2 · 10 min
Meet the Qubit
A magic coin that is heads AND tails while it spins.
Lesson 3 · 9 min
Bit vs Qubit
One does one thing at a time. The other holds every option.
Lesson 4 · 9 min
The Moment You Look
Looking is not free. Looking is what makes it decide.
Lesson 5 · 10 min
Not a Fair Coin
You can tilt the odds — and the tilt can be negative.
Lesson 6 · 11 min
The Impossible Pair
Two coins that always agree — without either one deciding first.
Lesson 7 · 10 min
Moves You Can Make
Every quantum move can be undone. That is the rule.
Lesson 8 · 11 min
Waves That Cancel
The trick is not trying everything. It is cancelling the wrong answers.
Lesson 9 · 10 min
What Is It Actually Good At?
Not everything. A short, specific list — and that is fine.
Lesson 10 · 10 min
Why It Is So Hard
The magic leaks. Everything else is a fight to slow the leak down.
Lesson 11 · 12 min
You Can Run One
Everything you just learned, in five lines you can actually execute.
Lesson 12 · 7 min
Where To Go Next
You now know more than most people who write headlines about this.
More lessons are on the way — gates, entanglement, measurement and the Bloch sphere.