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arXiv · 2601.20535

De-excitation effects on entanglement in multi-nucleon transfer reactions

Y. C. Yang·D. D. Zhang·D. Vretenar·B. Li·T. Nikšić·P. W. Zhao·J. Meng
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Abstract

This study quantifies the impact of nuclear de-excitation on correlations in multi-nucleon transfer (MNT) reactions. To bridge the gap between initial collision dynamics and final experimental observables, we introduce a hybrid TDCDFT+GEMINI approach, integrating time-dependent covariant density functional theory (TDCDFT) with the statistical de-excitation model GEMINI++. Applied to the $^{40}$Ca + $^{208}$Pb reaction, our method demonstrates that the de-excitation is essential for reconciling theoretical cross sections with experimental data. Analysis of the cross-section Shannon entropy reveals that new reaction channels open abruptly at a specific energy threshold. By employing mutual information, we show that the de-excitation process significantly degrades the initial quantum entanglement between the projectile-like and the target-like fragments, revealing a key mechanism through which fundamental quantum correlations are lost.

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Y. C. Yang, D. D. Zhang, D. Vretenar, B. Li, T. Nikšić, P. W. Zhao, J. Meng. 2026-01-28. De-excitation effects on entanglement in multi-nucleon transfer reactions. https://doi.org/10.1103/fl3l-fb88

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