Detection of non-Gaussian quantum correlations through measurement-after-interaction protocols

• URL: http://arxiv.org/abs/2510.26760v1
• Date: Thu, 30 Oct 2025 17:50:20 GMT
• Title: Detection of non-Gaussian quantum correlations through measurement-after-interaction protocols
• Abstract summary: We show that measurement-after-interactions (MAI) protocols can significantly enhance the detection capability of witnesses for quantum correlations.<n>In particular, we show the possibility of detecting Einstein-Podolsky-Rosen steering and mode entanglement of non-Gaussian states from linear measurements only.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Additional state evolutions performed before measurement, also called measurement-after-interactions (MAI) protocols, have shown a great potential for increasing the sensitivity of metrological scenarios. Here, we go beyond this result and show that MAI techniques can significantly enhance the detection capability of witnesses for quantum correlations. In particular, we show the possibility of detecting Einstein-Podolsky-Rosen steering and mode entanglement of non-Gaussian states from linear measurements only. Moreover, we show that such approach allows for a significantly higher noise robustness.

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