Quantum error mitigation in the regime of high noise using deep neural network: Trotterized dynamics

• Published in: Quantum information processing Vol. 23; no. 3
• Main Authors: Zhukov, Andrey, Pogosov, Walter
• Format: Journal Article
• Language: English
• Published: New York Springer US 28-02-2024
• Subjects: Data Structures and Information Theory; Mathematical Physics; Physics; Physics and Astronomy; Quantum Computing; Quantum Information Technology; Quantum Physics; Spintronics; Quantum algorithms; NISQ processors; Neural networks; Trotter evolution; Machine learning; Ising model; Quantum error mitigation
• ISSN: 1573-1332; 1573-1332
• DOI: 10.1007/s11128-024-04296-y

We address a learning-based quantum error mitigation method, which utilizes deep neural network applied at the postprocessing stage, and study its performance in the presence of different types of quantum noises. We concentrate on the simulation of Trotterized dynamics of 2D spin lattice in the regime of high noise, when expectation values of bounded traceless observables are strongly suppressed. By using numerical simulations, we demonstrate a dramatic improvement of data quality for both local weight-1 and weight-2 observables for the depolarizing and inhomogeneous Pauli channels. At the same time, the effect of coherent
ZZ
crosstalks is not mitigated, so that in practice crosstalks should be at first converted into incoherent errors by randomized compiling.