Qoord, a simple quantum circuit simulator
Hi! I built this to teach myself how a quantum circuit simulator works. It's about 1000 lines of Python, aiming to be understandable more than being fast or robust. It's not meant to compete with anything else - just a personal project to really get clear on the under-the-hood theory of qubits and quantum gates.
Qoord, a simple quantum circuit simulator launched on February 19, 2024 with 23 votes, #1,006 of 3,962 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 2 years on.
In plain words
Qoord is a quantum circuit simulator written in approximately 1000 lines of Python. Designed for educational purposes, it prioritizes clarity and understandability over performance or robustness. It serves developers and students seeking to grasp the fundamental theory underlying qubits and quantum gates through a readable, accessible codebase rather than a production-ready tool.
written from the facts on this page · September 2026
From the sources
Tiny, rough-and-ready quantum circuit simulator for exploring quantum networking and computing. - scottmckuen/qoord
Does a similar job
all alternatives →
Quantum suicide in Python2016 · github.com · ▲151Simulate reverse causality using quantum suicide. Contribute to karldray/quantum development by creating an account on GitHub.
Play with real quantum physics in your browser2025 · quantum.orgsoft.org · ▲156I wanted to make the simplest app to introduce myself and others to quantum computing. Introducing, Schrödinger's Coin. Powered by a simple Hadamard gate[0] on IBM quantum, with this app you can directly interact with a quantum system to experience true randomness. Thoughts? Could you see any use cases for yourself of this? Or, does it inspire any other ideas of yours? Curious what others on HN think! [0] https://en.wikipedia.org/wiki/Quantum_logic_gate#Hadamard_ga...
I made a little digital circuit simulator that operates on PNGs2022 · github.com · ▲259This is a little toy project of mine that lets you simulate digital logic graphs. It was inspired by Minecraft's Redstone and the Piet esolang. It's got some serious drawbacks-- you write circuits as PNGs and simulate them with a Python interface. It's slow to run and slow to experiment with. And it is certainly difficult to use for people with any kind of color blindness. But despite that, I hope this can still be a fun toy!
Qumulator – quantum circuit simulator, 1000 qubits, no GPUApr 2026 · github.com · ▲14Python client SDK for the Qumulator quantum computing API - qumulator/qumulator-sdk
1-qubit quantum circuit simulator with interactive bloch sphere2024 · dazkins.com · ▲7This has been a small labour of love for a few days. Just a fun idea I had to create a single qubit quantum circuit simulator with interactive 3D bloch sphere. Check out my blog post linked on the page for further introduction to quantum computing!
More dev tools this month
the category →
open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.
Dev tools · 27d ago · github.com
Contribute to reladraw/reladraw development by creating an account on GitHub.
Dev tools · 25d ago · github.com
OpenBot▲362Grok Bot alternative: free, local, open-source, multiplayer
Dev tools · 23d ago · openbot.run
Talanoa▲345Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…
Dev tools · 20d ago · talanoa.email
CoreSpeed▲332One MCP for everything your agents need: apps, memory, tools
Dev tools · 28d ago · corespeed.io
Source: Show HN post ↗
Launched alongside, February 2024
the whole month →
MarketingIdeas.com▲1,230Never run out of marketing ideas ever again
Growth · 2024 · marketingideas.com
