Quilc is an open-source, optimizing compiler for gate-based quantum programs written in Quil or QASM, two popular quantum programming languages. The compiler was designed with attention toward NISQ-era quantum computers, specifically recognizing that each quantum gate has a non-negligible and often irrecoverable cost toward a program's successful execution. Quilc's primary goal is to make authoring quantum software a simpler exercise by making architectural details less burdensome to the author. Using Quilc allows one to write programs faster while usually not compromising---and indeed sometimes improving---their execution fidelity on a given hardware architecture. In this paper, we describe many of the principles behind Quilc's design, and demonstrate the compiler with various examples.
@article{arxiv.2003.13961,
title = {An Open-Source, Industrial-Strength Optimizing Compiler for Quantum Programs},
author = {Robert S. Smith and Eric C. Peterson and Mark G. Skilbeck and Erik J. Davis},
journal= {arXiv preprint arXiv:2003.13961},
year = {2020}
}