Efficient Use of Quantum Linear System Algorithms in Interior Point Methods for Linear Optimization

• URL: http://arxiv.org/abs/2205.01220v2
• Date: Fri, 10 Feb 2023 19:25:33 GMT
• Title: Efficient Use of Quantum Linear System Algorithms in Interior Point Methods for Linear Optimization
• Authors: Mohammadhossein Mohammadisiahroudi, Ramin Fakhimi, Tam\'as Terlaky
• Abstract summary: We develop an Inexact Infeasible Quantum Interior Point Method to solve linear optimization problems. We also discuss how can we get an exact solution by Iterative Refinement without excessive time of quantum solvers.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum computing has attracted significant interest in the optimization community because it potentially can solve classes of optimization problems faster than conventional supercomputers. Several researchers proposed quantum computing methods, especially Quantum Interior Point Methods (QIPMs), to solve convex optimization problems, such as Linear Optimization, Semidefinite Optimization, and Second-order Cone Optimization problems. Most of them have applied a Quantum Linear System Algorithm at each iteration to compute a Newton step. However, using quantum linear solvers in QIPMs comes with many challenges, such as having ill-conditioned systems and the considerable error of quantum solvers. This paper investigates how one can efficiently use quantum linear solvers in QIPMs. Accordingly, an Inexact Infeasible Quantum Interior Point Method is developed to solve linear optimization problems. We also discuss how can we get an exact solution by Iterative Refinement without excessive time of quantum solvers. Finally, computational results with QISKIT implementation of our QIPM using quantum simulators are analyzed.

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