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Detector-Independent Verification of Quantum Light



Jan Sperling, W.R. Clements, Andreas Eckstein, Meritt Moore, Jelmer Renema, Steven Kolthammer, Sae Woo Nam, Adriana Lita, Thomas Gerrits, Wolfgang Vogel, G.S. Agarwal, Ian Walmsley


We introduce a method for the verification of nonclassical light which is independent of the complex interaction between the generated light and the material of the detectors, which are in our work superconducting transition-edge sensors. This is achieved by an optical multiplexing scheme. The measured coincidence statistics is shown to be a mixture of multinomial distributions for any classical light field and any type of detector. This allows us to formulate bounds for the statistical properties of classical states. We apply our directly accessible method to heralded multi-photon states which are detected with a single multiplexing step only and two transition-edge sensors. The nonclassicality of the generated light is verified and characterized through the violation of the classical bounds without the need for characterizing the used detectors.
Physical Review Letters


nonclassical light, transition edge sensors' single photon detection


Sperling, J. , Clements, W. , Eckstein, A. , Moore, M. , Renema, J. , Kolthammer, S. , Nam, S. , Lita, A. , Gerrits, T. , Vogel, W. , Agarwal, G. and Walmsley, I. (2017), Detector-Independent Verification of Quantum Light, Physical Review Letters, [online],, (Accessed April 24, 2024)
Created April 20, 2017, Updated October 12, 2021