Optical quantum computing with photons of arbitrarily low fidelity and purity

Peter P. Rohde*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
5 Downloads (Pure)


Linear optics quantum computing (LOQC) is a leading candidate for the implementation of large scale quantum computers. Here quantum information is encoded into the quantum states of light and computation proceeds via a linear optics network. It is well known that in such schemes there are stringent requirements on the spatiotemporal structure of photons-they must be completely indistinguishable and of very high purity. We show that in the boson-sampling model for LOQC these conditions may be significantly relaxed. We present evidence that by increasing the size of the system we can implement a computationally hard algorithm even if our photons have arbitrarily low fidelity and purity. These relaxed conditions may make boson-sampling LOQC within reach of present-day technology.

Original languageEnglish
Article number052321
Pages (from-to)052321-1-052321-6
Number of pages6
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
Publication statusPublished - 19 Nov 2012

Bibliographical note

Rohde, PP. Physical review A. Atomic, molecular, and optical physics, 86(5), 052321, 2012. Copyright 2012 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.86.052321


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