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Modeling and simulating the noisy behavior of near-term quantum computers

Lookup NU author(s): Konstantinos Georgopoulos, Dr Clive Emary, Dr Paolo Zuliani


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© 2021 American Physical SocietyNoise dominates every aspect of near-term quantum computers, rendering it exceedingly difficult to carry out even small computations. In this paper we are concerned with the modeling of noise in noisy intermediate-scale quantum computers. We focus on three error groups that represent the main sources of noise during a computation and present quantum channels that model each source. We engineer a noise model that combines all three noise channels and simulates the evolution of the quantum computer using its calibrated error rates. We run various experiments of our model, showcasing its behavior compared to other noise models and an IBM quantum computer. We find that our model provides a better approximation of the quantum computer's behavior than the other models. Following this, we use a genetic algorithm to optimize the parameters used by our noise model, bringing the behavior of the model even closer to the quantum computer. Finally, a comparison between the pre- and postoptimization parameters reveals that, according to our model, certain operations can be more or less erroneous than the hardware-calibrated parameters show.

Publication metadata

Author(s): Georgopoulos K, Emary C, Zuliani P

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2021

Volume: 104

Issue: 6

Online publication date: 17/12/2021

Acceptance date: 03/12/2021

ISSN (print): 2469-9926

ISSN (electronic): 2469-9934

Publisher: American Physical Society


DOI: 10.1103/PhysRevA.104.062432


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