Abstract:
:The non-deterministic nature of photon sources is a key limitation for single-photon quantum processors. Spatial multiplexing overcomes this by enhancing the heralded single-photon yield without enhancing the output noise. Here the intrinsic statistical limit of an individual source is surpassed by spatially multiplexing two monolithic silicon-based correlated photon pair sources in the telecommunications band, demonstrating a 62.4% increase in the heralded single-photon output without an increase in unwanted multipair generation. We further demonstrate the scalability of this scheme by multiplexing photons generated in two waveguides pumped via an integrated coupler with a 63.1% increase in the heralded photon rate. This demonstration paves the way for a scalable architecture for multiplexing many photon sources in a compact integrated platform and achieving efficient two-photon interference, required at the core of optical quantum computing and quantum communication protocols.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Collins MJ,Xiong C,Rey IH,Vo TD,He J,Shahnia S,Reardon C,Krauss TF,Steel MJ,Clark AS,Eggleton BJdoi
10.1038/ncomms3582subject
Has Abstractpub_date
2013-01-01 00:00:00pages
2582issn
2041-1723pii
ncomms3582journal_volume
4pub_type
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