Signal detection using biphotons and potential application in axion-like particle search

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This paper presents a new optical system for detecting light signals associated with the change in incoming photon number. The system employs quantum correlation of photon pairs created via spontaneous parametric down-conversion (SPDC). The signal, if present, will perturb the flux of the incident photon stream. The perturbed photon stream is first projected through a birefringent crystal where SPDC occurs, converting a single high-energy photon into a pair of low-energy photons. The photons in each pair eventually arrive at separate detectors. By examining the biphoton correlation using the probability distribution of the photons at the detectors, which varies depending on the displacement of the main "pump" photon stream and the change in the number of photons, the small optical displacement of the photon stream and its variance can be determined. The change in incident photon number, in other words, the presence of light signal does not influence the average of the measured optical displacement values. Nevertheless, the change in optical displacement measurement variance when the number of incident photons has changed detects the light signal. This optical setup enables the detection of light signals with low noise and remarkably high precision and sensitivity using quantum correlation. The proposed technique has potential application for axion-like particle search in experimental high energy physics.
Publisher
ELSEVIER
Issue Date
2020-12
Language
English
Article Type
Article
Citation

NUCLEAR PHYSICS B, v.961, pp.115215

ISSN
0550-3213
DOI
10.1016/j.nuclphysb.2020.115215
URI
http://hdl.handle.net/10203/281122
Appears in Collection
RIMS Journal Papers
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1-s2.0-S055032132030300X-main.pdf(931.75 kB)Download

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