• Corpus ID: 118129768

Understanding photonic quantum-logic gates: The road to fault tolerance

@article{Weinhold2008UnderstandingPQ,
  title={Understanding photonic quantum-logic gates: The road to fault tolerance},
  author={Till Weinhold and Alexei Gilchrist and Kevin J. Resch and Andrew C. Doherty and Jeremy Lloyd O'Brien and Geoff J. Pryde and Andrew G. White},
  journal={arXiv: Quantum Physics},
  year={2008}
}
Fault-tolerant quantum computing requires gates which function correctly despite the presence of errors, and are scalable if the error probability-per-gate is below a threshold value. To date, no method has been described for calculating this probability from measurements on a gate. Here we introduce a technique enabling quantitative benchmarking of quantum-logic gates against fault-tolerance thresholds for any architecture. We demonstrate our technique experimentally using a photonic… 

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References

SHOWING 1-9 OF 9 REFERENCES

Focus on Single Photons on Demand

It is safe to say that, when the concept of the photon was first introduced, the generation of single photons was not being considered. Until the emergence of the ideas and methods of quantum optics,

Quantum computation and quantum information

  • T. Paul
  • Physics
    Mathematical Structures in Computer Science
  • 2007
This special issue of Mathematical Structures in Computer Science contains several contributions related to the modern field of Quantum Information and Quantum Computing. The first two papers deal

Accurate quantum state estimation via "Keeping the experimentalist honest"

In this article, we derive a unique procedure for quantum state estimation from a simple, self-evident principle: an experimentalist's estimate of the quantum state generated by an apparatus should

Convex Optimization

A comprehensive introduction to the subject of convex optimization shows in detail how such problems can be solved numerically with great efficiency.

Nature 434

  • 39-44
  • 2005

Quantum information and computation

In information processing, as in physics, the classical world view provides an incomplete approximation to an underlying quantum reality that can be harnessed to break codes, create unbreakable codes, and speed up otherwise intractable computations.

Physical Review Letters 63

  • 1989

The Gremlins ( Random House Press , New York , 1943 ) . [ 19 ] E

  • 1996

For example, see special issue: Single-photon: detectors, applications, and measurement methods

  • Journal of Modern Optics
  • 2004