Highly photon loss tolerant quantum computing using hybrid qubits

• URL: http://arxiv.org/abs/2011.04209v1
• Date: Mon, 9 Nov 2020 06:05:44 GMT
• Title: Highly photon loss tolerant quantum computing using hybrid qubits
• Authors: S. Omkar and Y. S. Teo and Seung-Woo Lee and H. Jeong
• Abstract summary: We show that the photon loss threshold reported by Omkar it et al. [Phys. Rev. Lett. 125, 060501 ( 2020)] can be improved further by employing postselection and multi-Bell-state-measurement based entangling operation. Neverthless, this scheme remains resource-efficient compared to other known optical schemes for fault-tolerant quantum computation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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 {\it et al}. [Phys. Rev. Lett. 125, 060501 (2020)] can be improved further by employing postselection and multi-Bell-state-measurement based entangling operation to create a special cluster state, known as Raussendorf lattice for topological quantum computation. In particular, the photon loss threshold is enhanced up to $5.7\times10^{-3}$, 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 to the scheme in the aforementioned reference. Neverthless, this scheme remains resource-efficient compared to other known optical schemes for fault-tolerant quantum computation.

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