Error models for mode mismatch in linear optics quantum computing

Peter P. Rohde and Timothy C. Ralph
Phys. Rev. A 73, 062312 – Published 9 June 2006

Abstract

One of the most significant challenges facing the development of linear optics quantum computing (LOQC) is mode mismatch, whereby photon distinguishability is introduced within circuits, undermining quantum interference effects. We examine the effects of mode mismatch on the parity (or fusion) gate, the fundamental building block in several recent LOQC schemes. We derive simple error models for the effects of mode mismatch on its operation, and relate these error models to current fault-tolerant-threshold estimates.

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  • Received 1 February 2006

DOI:https://doi.org/10.1103/PhysRevA.73.062312

©2006 American Physical Society

Authors & Affiliations

Peter P. Rohde* and Timothy C. Ralph

  • Centre for Quantum Computer Technology, Department of Physics, University of Queensland, Brisbane, Queensland 4072, Australia

  • *Electronic address: rohde@physics.uq.edu.auURL: http://www.physics.uq.edu.au/people/rohde/

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Vol. 73, Iss. 6 — June 2006

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