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Quantum ComputingAN INTERACTIVE OPEN TEXTBOOK
charithj.com.au

A book for the quantum curious.Open access. Open possibilities. ↗

LEARN · VISUALISE · EXPERIMENT

A clearer path into
quantum computing.

Big ideas, made approachable. An interactive guide that takes you from your first qubit to the frontiers of quantum computing, one experiment at a time.

A LITTLE QUANTUM INTUITION01 / QUBIT
|0⟩|1⟩xyz|ψ⟩
YOUR QUANTUM STATEP(0) = 50.0% · P(1) = 50.0%
Try a gate

One qubit. Many possibilities. Start exploring.

A DIFFERENT WAY OF THINKING.
01 No physics prerequisite02 Learn through experiments03 Move at your own pace04 Free, without a login

ONE BOOK. MANY WAYS IN.

Find your next idea.

View the full contents ↗

Start with the foundations or follow your curiosity. Every pathway is open.

A growing textbook: the introduction and first foundation lessons are ready to explore. Specialist chapters are transparently mapped in the 170-chapter roadmap.

LESS SCROLLING. MORE DISCOVERY.

Don’t just read it.
Try it.

Turn a gate. Change a phase. Watch the probabilities shift. Our small, focused experiments make abstract ideas something you can investigate.

Enter the experiment studio →

Runs entirely in your browser. No installs. No cloud credits.

L03 / INTERFERENCEIdeal-state model
|0⟩HZHM
|0⟩
0%|1⟩
100%

Same probabilities in the middle.
A completely different outcome at the end.

Find out why →

YOUR CURIOSITY. YOUR ROUTE.

You don’t have to
learn it all at once.

A gentle beginning, a software perspective or a mathematical deep dive. Choose the route that fits where you are.

Find your pathway ↗
  1. 01
    I’m completely new to quantum →

    Start with the ideas. Build confidence as you go.

  2. 02
    I think in code →

    Connect familiar software concepts to quantum workflows.

  3. 03
    I want to go deeper →

    Follow the mathematics, assumptions and evidence.

THE FIRST STEP IS SMALL.

Your first qubit is waiting.

Let’s explore it →