Experimental quantification of controller-loading overhead

Quantify experimentally how the use of precompiled branches or runtime parameters on FPGA-based or comparable quantum controllers reduces controller-loading overhead for grouped direct fidelity estimation, taking into account the specific hardware and compilation policy.

Background

The paper’s numerical evidence is simulation-based, and the authors identify experimental resource accounting as a remaining step toward deployment. In particular, grouping reduces the number of distinct input–output settings, but the resulting reduction in compilation and controller-loading overhead depends on how a given control stack handles precompiled branches, runtime parameter selection, and full-circuit program loading. The paper therefore leaves the hardware-dependent magnitude of this operational benefit unresolved.