Experimental generalized quantum suppression law in Sylvester interferometers

Niko Viggianiello*, Luca Innocenti, Fulvio Flamini, Daniele Cozzolino, Marco Bentivegna, Nicolò Spagnolo, Andrea Crespi, Daniel Brod, Ernesto Galvão, Roberto Osellame

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
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Photonic interference is a key quantum resource for optical quantum computation, and in particular for so-called boson sampling devices. In interferometers with certain symmetries, genuine multiphoton quantum interference effectively suppresses certain sets of events, as in the original Hong–Ou–Mandel effect. Recently, it was shown that some classical and semi-classical models could be ruled out by identifying such suppressions in Fourier interferometers. Here we propose a suppression law suitable for random-input experiments in multimode Sylvester interferometers, and verify it experimentally using 4- and 8-mode integrated interferometers. The observed suppression occurs for a much larger fraction of input–output combinations than what is observed in Fourier interferometers of the same size, and could be relevant to certification of boson sampling machines and other experiments relying on bosonic interference, such as quantum simulation and quantum metrology.
Original languageEnglish
Article number033017
Number of pages15
JournalNew Journal of Physics
Publication statusPublished - 26 Mar 2018


  • quantum
  • quantum information
  • photonics
  • quantum optics
  • boson sampling

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