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Title: Spatially resolved single photon detection with a quantum sensor array
Authors: Zagoskin, Alexandre M.
Wilson, Richard D.
Everitt, Mark J.
Savel'ev, Sergey
Gulevich, Dmitry R.
Allen, J.
Dubrovich, V.K.
Il'ichev, E.
Keywords: Superconducting devices
Issue Date: 2013
Publisher: Nature Publishing Group
Citation: ZAGOSKIN, A.M. et al, 2013. Spatially resolved single photon detection with a quantum sensor array. Scientific Reports, 3, article 3464.
Abstract: We propose a method of resolving a spatially coherent signal, which contains on average just a single photon, against the background of local noise at the same frequency. The method is based on detecting the signal simultaneously in several points more than a wavelength apart through the entangling interaction of the incoming photon with the quantum metamaterial sensor array. The interaction produces the spatially correlated quantum state of the sensor array, characterised by a collective observable (e.g., total magnetic moment), which is read out using a quantum nondemolition measurement. Weshow that the effects of local noise (e.g., fluctuations affecting the elements of the array) are suppressed relative to the signal from the spatially coherent field of the incoming photon as ˜1/√N , where N is the number of array elements. The realisation of this approach in the microwave range would be especially useful and is within the reach of current experimental techniques.
Description: This article was published in the journal Scientific Reports [Nature Publishing Group]. This work is licensed under a Creative Commons AttributionNonCommercial-ShareAlike 3.0 Unported license.
Sponsor: AMZ, RDW, ME and SS were supported by the John Templeton Foundation. EI acknowledges the financial support of the EU through the project iQIT.
Version: Published
DOI: 10.1038/srep03464
URI: https://dspace.lboro.ac.uk/2134/18229
Publisher Link: http://www.nature.com/srep/2013/131210/srep03464/full/srep03464.html
ISSN: 2045-2322
Appears in Collections:Published Articles (Physics)

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