qrs: Quantum Rust Library

A Rust library for simulating time-dependent quantum dynamics.

(Under highly diabatic development)

Usage

Currently supports dense representation of quantum objects. Basic operators such as the Pauli matrices can be created as

use qrs::base::pauli::dense as pauli;
let sx = pauli::sx::<f64>();

which creates a complex number operator sx over f64 precision reals.

Dependencies

This library currently requires system linkage to GSL and lapacke/cblas. On macOS, you can install gsl and openblas with homebrew.

Building with qrs

To build on macOS with openblas routines:

• When you create a package that depends on qrs, add to your Cargo.toml dependencies

  [dependencies]
  openblas-src = {version="0.7.0", default-features=false, features=["system"]}

  to instruct Cargo that you are linking to qrs
• To let cargo know the location of the libraries, create the file ./.cargo/config/ in the directory of your Cargo.toml file with the contents

  [target.x86_64-apple-darwin]
  rustflags = [   "-L", "native=/usr/local/opt/gcc/lib/gcc/9/",
                "-L", "native=/usr/local/opt/openblas/lib"]

  Alternatively, you can build using other supported bindings/sources for lapacke/cblas on rust. See the blas-lapack-rs instructions. If you use a source package, you only to have a prior system installation of GSL. However, lapack/cblas will be compiled with your crate. Normal Linux/Unix targets should not need a config file with standard installation directories

Planned Features

• Sparse operator representation
• Interface with Python objects and functions