🐣🧩 PyQASM

OpenQASM is a powerful language for expressing hybrid quantum-classical programs, but it lacks a comprehensive tool supporting the full capabilities of the language. PyQASM aims to fill this gap by building upon the openqasm3.parser, and providing advanced utilities for semantic analysis and compilation of OpenQASM 3 programs. PyQASM offers additional features such as program validation and unrolling, making it a powerful tool for quantum software developers. In PyQASM, “unrolling” refers to the process of simplifying a quantum program by expanding custom gate definitions and flattening complex language constructs like subroutines, loops, and conditional statements into basic operations. This technique, also known as program flattening or inlining, transforms nested and recursive structures into a linear sequence of operations consisting solely of qubit and classical bit declarations, gate operations, and measurement operations. By converting the program into this simplified format, it becomes easier to perform subsequent transpilation or compilation steps before executing the program on a quantum device. A practical example of PyQASM’s utility is its role in the qasm3 interface of the qBraid-QIR project. Here, PyQASM serves as a core dependency, leveraging its unrolling capabilities to simplify input programs and facilitate their seamless conversion into Quantum Intermediate Representation (QIR).