Boson Sampling on a Photonic Chip. / Spring, Justin B.; Metcalf, Benjamin J.; Humphreys, Peter C.; Kolthammer, W. Steven; Jin, Xian-Min; Barbieri, Marco; Datta, Animesh; Thomas-Peter, Nicholas; Langford, Nathan K.; Kundys, Dmytro; Gates, James C.; Smith, Brian J.; Smith, Peter G. R.; Walmsley, Ian A.

In: Science, Vol. 339, No. 6121, 15.02.2013, p. 798-801.

Research output: Contribution to journalArticle

Published
  • Justin B. Spring
  • Benjamin J. Metcalf
  • Peter C. Humphreys
  • W. Steven Kolthammer
  • Xian-Min Jin
  • Marco Barbieri
  • Animesh Datta
  • Nicholas Thomas-Peter
  • Nathan K. Langford
  • Dmytro Kundys
  • James C. Gates
  • Brian J. Smith
  • Peter G. R. Smith
  • Ian A. Walmsley

Abstract

Although universal quantum computers ideally solve problems such as factoring integers exponentially more efficiently than classical machines, the formidable challenges in building such devices motivate the demonstration of simpler, problem-specific algorithms that still promise a quantum speedup. We constructed a quantum boson-sampling machine (QBSM) to sample the output distribution resulting from the nonclassical interference of photons in an integrated photonic circuit, a problem thought to be exponentially hard to solve classically. Unlike universal quantum computation, boson sampling merely requires indistinguishable photons, linear state evolution, and detectors. We benchmarked our QBSM with three and four photons and analyzed sources of sampling inaccuracy. Scaling up to larger devices could offer the first definitive quantum-enhanced computation.
Original languageEnglish
Pages (from-to)798-801
Number of pages4
JournalScience
Volume339
Issue number6121
Early online date20 Dec 2012
DOIs
Publication statusPublished - 15 Feb 2013

Research outputs

This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

ID: 15944094