Analysis of non-Gaussian entanglement shows polynomial scaling for free states and exponential for resource states, indicating advanced quantum correlations.
Quantum state tomography requires exponential copies due to complex correlations. Generalizing the Hong-Ou-Mandel effect, we establish a resource theory for non-Gaussian entanglement, showing polynomial scaling for learning free states and exponential scaling for resource states. .
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Zhao et al. (2025) studied this question.
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