The PhotonQ Compiler converts quantum circuits expressed in OpenQASM 2.0, into an optimized graph-like representation that can be directly translated to hardware instructions on a (photonic) one-way quantum computer. The compiler is made up of three modules:
1. An input parser that reads OpenQASM 2.0 source files and transpiles the input into a circuit consisting only of declared reference gates ${HR_z, CZ}$
2. A graph extraction and optimization module based on ZX-calculus
3. A hardware-dependent instruction generator that generates the photonic one-way computer's explicit hardware instructions
Parser
The QASM parser is built with Unix text processing tools Flex and Bison and converts a pre-transpiled QASM circuit into a quantum circuit consisting only of ${HR_z, CZ}$ gates.
Graph extraction and optimization
This step constructs a graph representation of the circuit and applies methods from ZX-Calculus to perform optimization of the graph.
Hardware instructions
The last part involves execution on a discrete variable photonic platform. We currently include a simulation of the considered experimental photonic setup using Perceval.