Digitized Counterdiabatic Quantum Algorithms for Logistics Scheduling

TL;DR

This paper introduces digitized counterdiabatic quantum algorithms for logistics scheduling problems, demonstrating significant success probability improvements over existing quantum algorithms and successful implementation on current quantum hardware.

Contribution

The paper develops and benchmarks digitized counterdiabatic quantum algorithms, showing their superior performance and feasibility on NISQ devices for complex logistics problems.

Findings

DCQO outperforms QAOA by several orders of magnitude in success probability.

Algorithms are successfully implemented on cloud-based superconducting and trapped-ion quantum processors.

Circuit compression with counterdiabatic protocols makes quantum algorithms more suitable for current hardware.

Abstract

We study a job shop scheduling problem for an automatized robot in a high-throughput laboratory and a travelling salesperson problem with recently proposed digitized counterdiabatic quantum optimization (DCQO)algorithms. In DCQO, we find the solution of an optimization problem via an adiabatic quantum dynamics, which is accelerated with counterdiabatic protocols. Thereafter, we digitize the global unitary to encode it in a digital quantum computer. For the job-shop scheduling problem, we aim at finding the optimal schedule for a robot executing a number of tasks under specific constraints, such that the total execution time of the process is minimized. For the traveling salesperson problem, the goal is to find the path that covers all cities and is associated with the shortest traveling distance. We consider both hybrid and pure versions of DCQO algorithms and benchmark the performance against digitized quantum annealing and the quantum approximate optimization algorithm (QAOA). In comparison to QAOA, the DCQO solution is improved by several orders of magnitude in success probability using the same number of two-qubit gates. Moreover, we implement our algorithms on cloud-based superconducting and trapped-ion quantum processors. Our results demonstrate that circuit compression using counterdiabatic protocols is amenable to current NISQ hardware and can solve logistics scheduling problems, where other digital quantum algorithms show insufficient performance.