Hardware-Assisted Parameterized Circuit Execution
Abstract
Standard compilers for quantum circuits decompose arbitrary single-qubit gates into a sequence of physical X(pi/2) pulses and virtual-Z phase gates. Consequently, many circuit classes implement different logic operations but have an equivalent structure of physical pulses that only differ by changes in virtual phases. When many structurally-equivalent circuits need to be measured, generating sequences for each circuit is unnecessary and cumbersome, since compiling and loading sequences onto classical control hardware is a primary bottleneck in quantum circuit execution. In this work, we develop a hardware-assisted protocol for executing parameterized circuits on our FPGA-based control hardware, QubiC. This protocol relies on a hardware-software co-design technique in which software identifies structural equivalency in circuits and "peels" off the relevant parameterized angles to reduce the overall waveform compilation time. The hardware architecture then performs real-time "stitching" of the parameters in the circuit to measure circuits that implement a different overall logical operation. This work demonstrates significant speed ups in the total execution time for several different classes of quantum circuits.
Cite
@article{arxiv.2409.03725,
title = {Hardware-Assisted Parameterized Circuit Execution},
author = {Abhi D. Rajagopala and Akel Hashim and Neelay Fruitwala and Gang Huang and Yilun Xu and Jordan Hines and Irfan Siddiqi and Katherine Klymko and Kasra Nowrouzi},
journal= {arXiv preprint arXiv:2409.03725},
year = {2025}
}