Quantum search followed by classical search versus quantum search alone

TL;DR

This paper explores a hybrid search method combining quantum and classical algorithms, demonstrating that additional quantum information can optimize search performance by switching between quantum and classical approaches at strategic moments.

Contribution

It introduces a novel hybrid search strategy that leverages extra quantum information to improve search efficiency over purely quantum methods.

Findings

Hybrid quantum-classical search outperforms pure quantum search in certain scenarios

Using quantum information to switch to classical search reduces overall search time

The approach offers a new way to enhance quantum algorithms with classical techniques

Abstract

In this work, we show that the usage of a quantum gate that gives extra information about the solution searched permits to improve the performance of the search algorithm by switching from quantum to classical search in the appropriated moment. A comparison to the case where only quantum search is used is also realized.