References & Citations
Quantum Physics
Title: Quantification of Quantum Correlations in Two-Beam Gaussian States Using Photon-Number Measurements
(Submitted on 12 Sep 2022 (v1), last revised 16 Jan 2023 (this version, v2))
Abstract: Identification, and subsequent quantification of quantum correlations, is critical for understanding, controlling, and engineering quantum devices and processes. We derive and implement a general method to quantify various forms of quantum correlations using solely the experimental intensity moments up to the fourth order. This is possible as these moments allow for an exact determination of the global and marginal impurities of two-beam Gaussian fields. This leads to the determination of steering, tight lower and upper bounds for the negativity, and the Kullback-Leibler divergence used as a quantifier of state nonseparability. The principal squeezing variances are determined as well using the intensity moments. The approach is demonstrated on the experimental twin beams with increasing intensity and the squeezed super-Gaussian beams composed of photon pairs. Our method is readily applicable to multibeam Gaussian fields to characterize their quantum correlations.
Submission history
From: Jan Perina Jr. [view email][v1] Mon, 12 Sep 2022 17:28:22 GMT (133kb)
[v2] Mon, 16 Jan 2023 11:10:13 GMT (163kb)
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