Highly photon-loss-tolerant quantum computing using hybrid qubits

S. Omkar, Y. S. Teo, Seung-Woo Lee, and H. Jeong
Phys. Rev. A 103, 032602 – Published 9 March 2021

Abstract

We investigate a scheme for topological quantum computing using optical hybrid qubits and make an extensive comparison with previous all-optical schemes. We show that the photon loss threshold reported by Omkar et al. [Phys. Rev. Lett. 125, 060501 (2020)] can be improved further by employing postselection and multi-Bell-state-measurement-based entangling operations to create a special cluster state, known as Raussendorf lattice for topological quantum computation. In particular, the photon loss threshold is enhanced up to 5.7×103, which is the highest reported value given a reasonable error model. This improvement is obtained at the price of consuming more resources by an order of magnitude compared with the scheme in the aforementioned reference. Nevertheless, this scheme remains resource-efficient compared with other known optical schemes for fault-tolerant quantum computation.

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  • Received 9 November 2020
  • Accepted 17 February 2021

DOI:https://doi.org/10.1103/PhysRevA.103.032602

©2021 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

S. Omkar1,*, Y. S. Teo1, Seung-Woo Lee2, and H. Jeong1,†

  • 1Department of Physics and Astronomy, Seoul National University, 08826 Seoul, Korea
  • 2Center for Quantum Information, Korea Institute of Science and Technology, Seoul, 02792, Korea

  • *omkar.shrm@gmail.com
  • h.jeong37@gmail.com

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Vol. 103, Iss. 3 — March 2021

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