The New Art Of Composing A Quantum Circuit

Extending is so yesterday.

Clean, maintainable code is essential in quantum computing. You are juggling two intertwined levels: classical logic, which builds the program flow, and the quantum circuit, which performs the actual calculation. If you repeat the same steps to build the circuits over and over again, errors, overload, and frustration are inevitable. This is where the DRY principle comes into play: Don't Repeat Yourself!

Unfortunately, building quantum circuits often feels less like following a clear blueprint and more like practical experimentation in a Jupyter notebook. Without a solid structure, your notebook can quickly turn into a confusing web of duplicate code. A repeated gate sequence for an adder here, the same cost function encoder there. These repetitions not only waste time, but also hide errors and make debugging a nightmare.