Communication Trade Offs in Intermediate Qudit Circuits

TL;DR

This paper explores how leveraging higher-level qudits in quantum circuits can improve efficiency in quantum computing, balancing benefits against diminishing returns in hardware utilization.

Contribution

It introduces methods for higher-level qudit communication circuits and compilation pipelines that optimize quantum hardware usage.

Findings

Higher-level qudits can enhance circuit efficiency

Diminishing returns observed beyond certain levels

Methods improve resource utilization in quantum devices

Abstract

Quantum computing promises speedup of classical algorithms in the long term. Current hardware is unable to support this goal and programs must be efficiently compiled to use of the devices through reduction of qubits used, gate count and circuit duration. Many quantum systems have access to higher levels, expanding the computational space for a device. We develop higher level qudit communication circuits, compilation pipelines, and circuits that take advantage of this extra space by temporarily pushing qudits into these higher levels. We show how these methods are able to more efficiently use the device, and where they see diminishing returns.