Qirby

"Anyone not shocked by quantum mechanics has not yet understood it." - Niels Bohr

Hunter's, duct-taped together, Quantum Computation Simulator. The goal is to be able to build out small QPU programs for the purposes of testing and overall expanding my understanding of Quantum computation.

Important

DISCLAIMER: This project is not intended to be performant or in any way an improvement on existing alternatives, but rather a playground for me to learn.

Usage

This was the project I decided to remake to learn Zig. That being said, during the middle of the remake, I really started to hate Zig and had other project ideas in mind, so the overall quality from a "Zig perspective" is pretty bad.

Testing

I've been using the following command to test the code. Via unit tests, The "circuit amp [11]" test is a quantum circuit that amplifies the $\ket{11}$ state in a two qubit system:

$ zig build test --summary all

Fun notes

Because this is just a playground for me, this is not optimized at all. There are a number of memory leaks that aren't being addressed and the performance isn't great, that being said for a quantum sim with a useful amount of Qubits would take forever anyways.

Resources References

Most of my references for logic gates and math is from this wikipedia article. That, in addition to YouTube video's and IBM's Quantum Composer.

First Iteration (2021)

Wrote the whole thing in C#, was insanely slow. A 12 qubit, 4-bit adder circuit took about 7 hours to compile ~20%.

Second Iteration (2024)

This is a pretty cool project, so I decided to rewrite the project in Zig as way to learn the language. Beginning to regret choosing Zig...