Explore
Quantum Computing
Like Never Before
Learn the weird, fascinating world of quantum computing visually, then experiment with it yourself.
How this course works
Nothing is hand-waved
Most explanations stop at "it is both 0 and 1 at once" and hope you nod along. We keep going, because that sentence is where the confusion starts, not where it ends.
Built in the right order
Every idea rests on the one before it. You are never asked to accept something now and understand it later, so the difficulty never piles up.
It ends on real hardware
This is not theory for its own sake. You finish knowing how Shor breaks encryption, why error correction is hard, and how to run a circuit on a real machine.
The arc
Where this actually takes you
36 steps, in an order that was designed rather than accumulated. This is the shape of the whole thing.
Where you start
Never seen a qubit
You know computers use bits. That is genuinely all you need to walk in with.
Two weeks in
Reading circuit diagrams
You can look at a quantum circuit and say what it does before anyone explains it.
The turning point
Following real algorithms
Grover and Shor stop being magic words. You can explain how each one actually works.
Where you land
Running code on real machines
You build circuits, run them on real quantum hardware, and know what the results mean.
Where you can go
Five tracks. Start with the first one.
Begin at Fundamentals. It assumes nothing. The others are there when you want them, and you can happily ignore the math track forever.
Who it is for
You do not need a physics degree
Most people arrive for one of four reasons. Any of them is a good one.
The curious
You keep reading that quantum computers will change everything and you want to know whether that is true. It partly is. You will learn which parts.
Developers
You write software and want to understand what this actually does to your work. Start with the cryptography track, because that part is already your problem.
Students
Your course threw linear algebra at you before explaining why. This gives you the intuition first, so the math has something to attach to.
Security and infra teams
You need to know what breaks, when, and what replaces it. That is six steps, and you can skip everything else.
One step at a time
You never have to guess what is next
Follow the path. Finish a lesson and the next one lights up. Nothing opens before you have what you need to understand it, so you can never land somewhere confusing.
See the whole pathQuestions
What Quantum Wallah is, and what it isn’t
What is Quantum Wallah?
- Quantum Wallah is a free online learning platform that teaches quantum computing to complete beginners through 36 short, diagram-led lessons across five tracks. No account, and no physics, maths, or coding background required. The lessons run from what a qubit is through to quantum algorithms, post-quantum cryptography, and quantum machine learning, and each one is built around a diagram and takes about six minutes to read.
Is Quantum Wallah related to Physics Wallah?
- No. Quantum Wallah is an independent quantum computing education platform. It is not affiliated with, owned by, or a product of Physics Wallah (PW), and the shared "Wallah" suffix is coincidental. Quantum Wallah publishes only quantum computing material, at quantumwallah.com.
Is Quantum Wallah free?
- Yes. All 36 lessons, the roadmap, and the Feynman Lab circuit builder are free to use, with no payment and no subscription. An optional free account saves your progress across devices, but nothing is locked behind it.
Do I need a physics or maths background to learn quantum computing here?
- No. The lessons are written for complete beginners and assume no physics, no university maths, and no coding. An optional track, Math Behind the Qubit, covers the small corner of linear algebra that quantum computing actually uses, for anyone who wants the formal version.
What does Quantum Wallah teach?
- Five tracks: Quantum Computing Fundamentals (8 lessons), Math Behind the Qubit (8), Quantum Algorithms (8), Quantum Cryptography (6), and Quantum Machine Learning (6). Together they cover qubits, superposition, entanglement, measurement, interference, Grover and Shor, the quantum Fourier transform, BB84 and quantum key distribution, the NIST post-quantum standards, and variational quantum machine learning.
What is the Feynman Lab?
- The Feynman Lab is Quantum Wallah’s in-browser quantum circuit builder. You drag gates onto a wire, watch the state and measurement probabilities update as you go, and export the finished circuit as Qiskit or Cirq code to run on real quantum hardware. It needs no installation and no prior syntax knowledge.
Who is Quantum Wallah for?
- Students, software engineers, and curious beginners who want to understand quantum computing properly rather than through analogies. It is also aimed at people in India getting started in quantum technology, which is where the project began, though the material is in English and open to anyone.
Get in touch
Tell us what you think
Found something confusing? Spotted a mistake? Want a topic covered that is not here yet? We read everything, and corrections are especially welcome.
The Feynman Lab
Stop reading. Start building.
Drag gates onto a wire, watch the amplitudes move, and measure the result. Then export the whole thing as Qiskit or Cirq code and run it on real quantum hardware.
- Build circuits by dragging gates, no syntax to learn
- See the state and measurement odds update as you go
- Export to Qiskit or Cirq and run it for real
- Outcomes that occur
- Outcomes with zero amplitude