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TT: Fachverband Tiefe Temperaturen

TT 11: Focus Session: Simulating Quantum Many-Body Systems on Noisy Intermediate-Scale Quantum Computers (joint session TT/DY)

TT 11.7: Vortrag

Montag, 16. März 2020, 18:00–18:15, HSZ 03

analysis of probabilistic error cancellation method on NISQ quantum computers — •Jiasheng Xie^{1, 2}, Sebastian Zanker¹, and Michael Marthaler¹ — ¹HQS Quantum Simulations GmbH, Haid-und-Neu Straße 7, 76131 Kralsruhe, Germany — ²Freie Uiversität Berlin, 14195 Berlin, Germany

Noisy Intermediate-Scale Quantum (NISQ) technologies are likely to be developed in the near future with the possibility of building devices with 50 to a few hundred physical qubits. NISQ devices are very useful in simulating quantum many body systems and may be able to perform tasks beyond the capability of classical computers. However, these devices are very noisy and lack fault tolerance. In order to reduce the noise level in the NISQ devices, it is useful to implement quantum error mitigation scheme. We have tested probabilistic error cancellation (PEC) method, a quantum error mitigation protocol that utilizes gate set tomography and quasiprobability decomposition. We have benchmarked the noiseless system and noisy systems with basic types of decoherences for 4 qubit case and will compare them with the noise mitigated circuit using Richardson linear extrapolation and PEC method from simulation. This will provide us a good understanding of the usefulness of this particular error mitigation protocol for the NISQ quantum computer algorithms.