2019
DOI: 10.1038/s41598-019-52275-6
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Hybrid classical-quantum linear solver using Noisy Intermediate-Scale Quantum machines

Abstract: We propose a realistic hybrid classical-quantum linear solver to solve systems of linear equations of a specific type, and demonstrate its feasibility with Qiskit on IBM Q systems. This algorithm makes use of quantum random walk that runs in (N log(N)) time on a quantum circuit made of (log(N)) qubits. The input and output are classical data, and so can be easily accessed. It is robust against noise, and ready for implementation in applications such as machine learning.

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Cited by 31 publications
(19 citation statements)
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“…The work by Chen et. al [74] proposes a hybrid algorithm that uses quantum random walks for solving a particular type of linear system, producing a classical result in O(n log n). However, the closest related works to ours are the recent papers that employ variational algorithms [73,[75][76][77].…”
Section: Related Workmentioning
confidence: 99%
“…The work by Chen et. al [74] proposes a hybrid algorithm that uses quantum random walks for solving a particular type of linear system, producing a classical result in O(n log n). However, the closest related works to ours are the recent papers that employ variational algorithms [73,[75][76][77].…”
Section: Related Workmentioning
confidence: 99%
“…In addition, the derivative required to perform the gradient descent operations are calculated using automatic differentiation. The concept of classical optimization is becoming very popular in the field of quantum computing and has also resulted in several new domains called quantum machine learning [66], hybrid quantum computation [67], quantum annealing [68], etc.…”
Section: Classical Optimizationmentioning
confidence: 99%
“…Der HHL-Algorithmus verspricht hier erhebliche Potenziale, die jedoch aufgrund verschiedener Restriktionen zumindest aktuell nicht genutzt werden können. Abhilfe sollen aber auch für diese Problemstellung hybride quantenklassische Algorithmen schaffen [16].…”
Section: Hybride Algorithmen -Simulation Maschinelles Lernen Optimiunclassified