Measurement of sub-shot-noise spatial correlations without background subtraction

Giorgio Brida, Lucia Caspani, Alessandra Gatti, Marco Genovese, Alice Meda, Ivano Ruo Berchera

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In this Letter we present the measurement of sub-shot-noise spatial correlations without any subtraction of background, a result paving the way to realize sub-shot-noise imaging of weak objects.

Original languageEnglish
Article number213602
Number of pages4
JournalPhysical Review Letters
Issue number21
Publication statusPublished - 26 May 2009
Externally publishedYes


  • quantum imaging
  • sub shot noise imaging
  • background noise

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