Example for a Gate Concurrence Optimization

This example notebook was shown in the talk QuantumControl.jl: A modern framework for quantum optimal control at the APS March Meeting, 2023.

It is a stripped-down version of the example available at https://juliaquantumcontrol.github.io/GRAPE.jl/stable/examples/perfect_entanglers/

Before running the notebook, you should instantiate the project environment. In a checkout of this repository, run:

> julia --project=.
julia> using Pkg
julia> Pkg.instantiate()

Note that for maximum performance, the IJulia kernel running this notebooks (which should be installed in your Base Julia environment) must have at least 4 threads enabled. Check your installed kernels with jupyter kernelspec list. The kernel.json file for the kernel that is being used should look something like this:

{
  "display_name": "Julia 1.8 (auto threads)",
  "argv": [
    "/home/mgoerz/.local/julia-1.8.0/bin/julia",
    "-i",
    "--color=yes",
    "--project=@.",
    "--threads=auto",
    "/local_scratch/mgoerz/.julia/packages/IJulia/6TIq1/src/kernel.jl",
    "{connection_file}"
  ],
  "language": "julia",
  "env": {},
  "interrupt_mode": "signal"
}

Note specifically the --threads=auto, which allows the kernel to use all available threads.