QCA-STACK is a QCA design and simulation system written in Haskell. The system simulates discretely (with a modified bistable approximation simulation engine) and has no limits regarding the third spacial dimension, lending itself well to theoretical exploration with (stackable) three-dimensional designs. Read the thesis included in this repository for more information.

NB: The project was made on Windows and has thus not been tested on Linux or macOS.

1. Install Haskell Stack.
2. Install Jetbrains IntelliJ IDEA and install the plugin IntelliJ-Haskell. The latter link has detailed instruction on running a stack project in IntelliJ. Consult this if the following steps do not work for you.
   • NB: At the moment of writing the current version of IntelliJ-Haskell is 1.0.0-beta87. This version gives an error when you want to create a run configuration, though version 1.0.0-beta85 does not. This older version breaks IntelliJ version 2021.2.2 (the latest version at the time of writing) however, so you will need to downgrade it to version 2020.3.4.
3. Clone this repository or make sure you have the code folder and its contents on your file system.
4. Open the aforementioned folder in IntelliJ with the following steps (the steps could depend on your IntelliJ version):
   • Import project, select the code directory.
   • Select "Import project from external model" and select Haskell Stack.
   • Click configure on "Haskell Tool Stack" and select the path to the stack binary. On Windows, this is typically in: C:\Users\<username>\AppData\Roaming\local\bin\stack.exe.
5. Under the 'Haskell' menu, click "Update Settings and restart REPLs".
6. Now you can add run configurations:
   • Add new, Haskell Stack -> Haskell Stack REPL. Give a name to the run configuration (for instance "REPL"), tick "Allow running in parallel" and press OK. This configuration will launch GHCi.
   • Add new, Haskell Stack -> Haskell Stack Runner. Give a name again (for instance "RUN") and press OK. This configuration will compile the project running the main function in app/Main.hs to an exe; the output is written to .stack-work/dist/<buildid>/build/QCA-STACK-exe/QCA-STACK-exe.exe.
7. You are now ready to explore the possibilities of quantum-dot cellular automata with QCA-STACK.