1fbee12a12
This applies the patch discussed in gh-455 dynamically on import of `docutils`, in order to fix the broken HTML output from the `.. bibliography` directive. We constrain `docutils` during our build process to fix it to a version that is known-good with this change applied. The constraint may be dropped when docutils updates, as the relevant patch is merged to trunk. |
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| .github | ||
| examples | ||
| releasenotes | ||
| source | ||
| .gitignore | ||
| .pylintrc | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
| WG.md | ||
| constraints.txt | ||
| convert2pdf.py | ||
| convert2svg.py | ||
| governance.md | ||
| make.bat | ||
| requirements.txt | ||
README.md
OpenQASM
OpenQASM is an imperative programming language for describing quantum circuits. It is capable of describing universal quantum computing using the circuit model, measurement-based model, and near-term quantum computing experiments.
This repo contains the OpenQASM specification, examples, and tools for the OpenQASM intermediate representation.
OpenQASM is a Qiskit project.
Current version: 3.0
-
Live language specification version 3.0
-
The branch of this repository for the previous version: OpenQASM 2.0
About this project
In this repository, you'll find all the documentation related to OpenQASM, some useful OpenQASM examples, and plugins for some text editors.
Language specs
The live language documentation specification.
Examples
An example of OpenQASM 3.0 source code is given below. Several more examples may be found in the examples folder.
/*
* Repeat-until-success circuit for Rz(theta),
* cos(theta-pi)=3/5, from Nielsen and Chuang, Chapter 4.
*/
OPENQASM 3;
include "stdgates.inc";
/*
* Applies identity if out is 01, 10, or 11 and a Z-rotation by
* theta + pi where cos(theta)=3/5 if out is 00.
* The 00 outcome occurs with probability 5/8.
*/
def segment qubit[2] anc, qubit psi -> bit[2] {
bit[2] b;
reset anc;
h anc;
ccx anc[0], anc[1], psi;
s psi;
ccx anc[0], anc[1], psi;
z psi;
h anc;
measure anc -> b;
return b;
}
qubit input;
qubit[2] ancilla;
bit[2] flags = "11";
bit output;
reset input;
h input;
// braces are optional in this case
while(int(flags) != 0) {
flags = segment ancilla, input;
}
rz(pi - arccos(3 / 5)) input;
h input;
output = measure input; // should get zero
Citation format
For research papers, we encourage authors to reference.
- [Version 3.0] Andrew W. Cross, Ali Javadi-Abhari, Thomas Alexander, Niel de Beaudrap, Lev S. Bishop, Steven Heidel, Colm A. Ryan, John Smolin, Jay M. Gambetta, Blake R. Johnson "OpenQASM 3: A broader and deeper quantum assembly language" [arxiv:2104.14722].
- [Previous Version: 2.0] Andrew W. Cross, Lev S. Bishop, John A. Smolin, Jay M. Gambetta "Open Quantum Assembly Language" [arXiv:1707.03429].
Governance
The OpenQASM project has a process for accepting changes to the language and making decisions codified in its governance model.
License
This project is licensed under the Apache License 2.0 - see the LICENSE file for details.
Contributing
If you'd like to help please take a look to our contribution guidelines. This project adheres to a Code of Conduct. By participating, you are expected to uphold this code.
Release Notes
See the section on Release Notes contribution guidelines