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Variational Quantum Circuits for Multi-Qubit Gate Automata

2022-08-31 22:05:17
Arunava Majumder, Dylan Lewis, Sougato Bose
       

Abstract

Variational quantum algorithms (VQAs) may have the capacity to provide a quantum advantage in the Noisy Intermediate-scale Quantum (NISQ) era. Here, we present a quantum machine learning (QML) framework, inspired by VQAs, to tackle the problem of finding time-independent Hamiltonians that generate desired unitary evolutions, i.e. multi-qubit quantum gates. The Hamiltonians are designed by tuning local fields and two-body interaction terms only. We find that our approach achieves high fidelity quantum gates, such as the Toffoli gate, with a significantly lower computational complexity than is possible classically. This method can also be extended to realize higher-order multi-controlled quantum gates, which could be directly applied to quantum error correction (QEC) schemes.

Abstract (translated)

URL

https://arxiv.org/abs/2209.00139

PDF

https://arxiv.org/pdf/2209.00139.pdf


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