期刊
PHYSICAL REVIEW A
卷 96, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.96.013804
关键词
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资金
- European Union's Horizon research and innovation program [665148]
- Engineering and Physical Sciences Research Council (EPSRC) [EP/K034480/1]
- Netherlands Organization for Scientific Research
- EPSRC [EP/M013243/1]
- Quantum Information Science Initiative (QISI)
- European Research Council Advanced Grant (MOQUACINO)
- Engineering and Physical Sciences Research Council [EP/K034480/1, EP/M013243/1] Funding Source: researchfish
- EPSRC [EP/M013243/1, EP/K034480/1] Funding Source: UKRI
In Sperling et al. [Phys. Rev. Lett. 118, 163602 (2017)], we introduced and applied a detector-independent method to uncover nonclassicality. Here, we extend those techniques and give more details on the performed analysis. We derive a general theory of the positive-operator-valued measure that describes multiplexing layouts with arbitrary detectors. From the resulting quantum version of a multinomial statistics, we infer nonclassicality probes based on a matrix of normally ordered moments. We discuss these criteria and apply the theory to our data which are measured with superconducting transition-edge sensors. Our experiment produces heralded multiphoton states from a parametric down-conversion light source. We show that the known notions of sub-Poisson and sub-binomial light can be deduced from our general approach, and we establish the concept of sub-multinomial light, which is shown to outperform the former two concepts of nonclassicality for our data.
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