https://github.com/bsc-quantic/quac.jl

Quantum Circuit representation library in Julia
https://github.com/bsc-quantic/quac.jl

julia quantum-algorithms quantum-circuits quantum-computing

Last synced: about 1 month ago
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Quantum Circuit representation library in Julia

• Host: GitHub
• URL: https://github.com/bsc-quantic/quac.jl
• Owner: bsc-quantic
• License: apache-2.0
• Created: 2022-08-10T10:04:02.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2024-04-24T14:07:54.000Z (8 months ago)
• Last Synced: 2024-04-24T16:29:37.777Z (8 months ago)
• Topics: julia, quantum-algorithms, quantum-circuits, quantum-computing
• Language: Julia
• Homepage: https://bsc-quantic.github.io/Quac.jl/
• Size: 555 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 17
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Quac

[![docs](https://img.shields.io/badge/docs-stable-blue)](https://bsc-quantic.github.io/Quac.jl)

[![CI](https://github.com/bsc-quantic/Quac.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/bsc-quantic/Quac.jl/actions/workflows/CI.yml)

[![codecov](https://codecov.io/gh/bsc-quantic/Quac.jl/branch/master/graph/badge.svg?token=D7KVE9SG9Z)](https://codecov.io/gh/bsc-quantic/Quac.jl)

[![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)

[![Registry](https://badgen.net/badge/registry/bsc-quantic/purple)](https://github.com/bsc-quantic/Registry)

`Quac` stands for _**Qua**ntum **c**ircuits_ and its a Julia library for quantum circuits with no assumptions about their use.

**_What does this means, you ask?_** Well, `Quac` is not a simulator, neither a controller of quantum computers. It just provides a `Circuit` data stracture, a set of gates and tools to manipulate them. Developers may use it as the core of their simulators or hardware controllers.

> ⚠️ Measurement gates are not currently supported as we are exploring how to fit non-unitary gates.

## Features

### Multiple representation of gates

Gates are symbolic in the sense that they do not store their representation. In `Quac` a gate just stores the lane in which it acts, and parameters if it's a parametric gate. Thanks to Julia's multiple-dispatch different representations can be queried lazily.

For example, this is a $Z$ that acts on qubit 4.

```julia

julia> using Quac

julia> gate = Z(4)

```

Any gate can be represented by a dense matrix.

```julia

julia> Matrix(gate)

2×2 Matrix{ComplexF32}:

 1.0+0.0im   0.0+0.0im

 0.0+0.0im  -1.0+0.0im

```

You can even specify the `eltype`!

```julia

julia> Matrix{Int}(gate)

2×2 Matrix{Int64}:

 1   0

 0  -1

```

Furthermore, the $Z$ gate allows a `Diagonal` representation!

```julia

julia> using LinearAlgebra

julia> Diagonal{Float32}(gate)

2×2 Diagonal{Float32, Vector{Float32}}:

 1.0    ⋅

  ⋅   -1.0

```

### Layout-agnostic `Circuit` representation

Quac uses multi-priority queues for representing `Circuit`s.

### SVG rendering of `Circuit`s

```julia

using Quac

circ = Quac.Algorithms.QFT(4)

draw(circ)

```

![Quantum Fourier Transform](docs/src/assets/qft.svg)

## Roadmap

- [ ] Gate decompositions

- [ ] ZX-calculus

- [ ] Spatial layouts

- [ ] Measurements

- [x] Visualization

- [ ] Support for _qudits_