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Hanbury-Brown Twiss correlations to probe the population statistics of GHz photons emitted by conductors

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Academic year: 2021

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Figure 1: Schematics of the HBT experiment (a), of the GHz beam splitter (b), of the amplification and detection chains (c)
Figure 2: Thermal source at ν = 1.7 GHz. Main frame: quantum crossover at T Q /2 ≈ 40 mK in the mean photon power P 1 as function of temperature T , or effective occupation number k B T /hν for a beam splitter temperature T 0 ≈ 17 mK
Figure 3: : Superpoissonian correlations of a thermal source in the classical regime: mean photon power P i and noise p
Figure 4: Poissonian correlations of a coherent monochromatic source. Autocorrelations are linear in the input RF power with a large Fano factor F due to amplification and attenuation

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