Quantum Physics in Action
Like Duolingo, but for Quantum Physics in Action. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
Free during early access · No credit card · iPhone & Android

Key ideas in Quantum Physics in Action
- Electrons need a specific energy boost to jump from the valence to the conduction band
- Doping introduces impurities to shift the material's Fermi level
- Insulators have large gaps that thermal energy alone cannot bridge
- P-type doping creates positive 'holes' that act as mobile charge carriers
- Semiconductors have narrow gaps that allow controlled switching
- N-type doping provides surplus electrons for conduction
- How band gap size determines a material's electrical behavior
- The mechanism of doping to create charge carriers
- Electrons and holes recombine at the interface to create a neutral barrier
- Tunneling allows particles to cross barriers they lack the energy to climb
- The depletion region prevents further flow without external voltage
- The probability of tunneling depends on the thickness of the barrier
- Forward bias shrinks the barrier while reverse bias widens it
- Trapped electrons on the gate represent a binary state (0 or 1)
- The formation and function of a P-N junction
- The application of quantum tunneling in non-volatile memory
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Quantum Physics in Action the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
What is the primary purpose of 'doping' a pure semiconductor crystal?
Get it right to open this lesson and 11 more in the app.
Where Quantum Physics in Action takes you
Move beyond theoretical paradoxes to see how quantum mechanics actually powers your smartphone, the internet, and the future of computing.
- 1
Quantum Tech in Your Pocket
- The Semiconductor Revolution
- Lasers: Light in Lockstep
- 2
The Logic of the Very Small
- Computing with Superposition
- Entanglement and Secure Secrets
2 sections · 4 units · 12 levels. Built to play, not to enroll.
You pick the voice
Quantum Physics in Action is taught in the The Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Quantum Physics in Action today.
Download Tomo, search Quantum Physics in Action, and play your first lesson in under a minute.