# Qulacs Documentation

Qulacs is a fast quantum circuit simulator for simulating large, noisy,
or parametric quantum circuits. Implemented in C/C++ and with Python
interface, Qulacs achieved both high speed circuit simulation and high
usability.

Qulacs was developed in Prof. [Fujii\'sgroup](http://quantphys.org/wp/qinfp/). Maintained and developing new features by [QunaSys](http://www.qunasys.com/).


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    <a href="https://www.github.com/qulacs/qulacs">
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        GitHub
    </a>
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        Slack Community
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        Study material (Japanese)
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## Get Started

```
pip install qulacs
```

Detailed instructions about installation in {doc}`intro/1_install`. 
Having trouble starting? see {doc}`intro/2_faq`.
For basic usage of Qulacs in Python and C++, see {doc}`intro/3_usage`.

```{toctree}
:maxdepth: 1
:hidden:
:caption: Get Started

intro/0_about
intro/1_install
intro/2_faq
intro/3_usage
```

```{toctree}
:maxdepth: 1
:caption: Tutorials

intro/4.1_python_tutorial
intro/4.2_cpp_tutorial
```

```{toctree}
:maxdepth: 2
:caption: User Manual

guide/2.0_python_advanced
```

```{toctree}
:maxdepth: 2
:caption: Applications

apply/0_overview
```

```{toctree}
:maxdepth: 2
:caption: API reference
:hidden:

pyRef/index
api/cpp_library_root
```

```{toctree}
:maxdepth: 1
:caption: Contributing

write/0_readme
```