A Quantum Computing Programming Language for Transparent Experiment Descriptions

We present a new quantum programming language called ‘Qualia’ that enables transparent programming of quantum hardware. Qualia allows seamless integration of abstraction layers such as the digital circuit layer and the analog control pulse waveform layer. Additionally, the language supports user-issued low-level hardware instructions like FPGA actions. Mid-circuit measurements and branching decision logic support real-time, adaptive programs. This flexibility allows users to write code for everything from quantum error correction to analog quantum simulation. The combination of a user-facing calibration database and a powerful symbolic algebra framework provides users with an unprecedented level of expressiveness and transparency. We display the salient characteristics of the language structure and describe how the accompanying compiler can translate programs written in any abstraction layer into precisely timed hardware commands. Qualia provides a fully transparent programming interface that allows simultaneous circuit level and hardware level control. There is no "behind-the-scenes" circuit compilation or hardware calibration. Every command is executed exactly as the the user dictates.