Demonstration of the Essentiality of Entanglement in a Deutsch-like Quantum Algorithm

TL;DR

This paper demonstrates through a new quantum algorithm and experiments with superconducting qubits that entanglement is essential for achieving quantum speedup over classical algorithms.

Contribution

The paper introduces a quantum algorithm that explicitly shows the necessity of entanglement for quantum advantage, supported by experimental validation.

Findings

Entanglement enhances quantum algorithm performance.

Experimental results confirm the algorithm's viability.

Entanglement is crucial for quantum speedup.

Abstract

Quantum algorithms could efficiently solve certain classically intractable problems by exploiting quantum parallelism. To date, whether the quantum entanglement is useful or not for quantum computing is still a question of debate. Here, we present a new quantum algorithm to show that entanglement could help to gain advantage over classical algorithm and even the quantum algorithm without entanglement. Furthermore, we implement experiments to demonstrate our proposed algorithm using superconducting qubits. Our results show the viability of the algorithm and suggest that entanglement is essential in getting quantum speedup for certain problems in quantum computing, which provide a reliable and clear guidance for developing useful quantum algorithms in future.