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Exotic Decays in Open Quantum Systems

Talk by Professor Simin Wang from Fudan University on July 16th, 2024 Abstract: The nucleus serves as a distinctive platform for exploring quantum many-body physics, characterized by the interplay between its two fermionic components: protons and neutrons. When nuclei extend beyond the dripline, the delicate balance between these fermionic components is disrupted, leading to spontaneous decay. Under such extreme conditions, the presence of a low-lying continuum can induce exotic phenomena. This presentation will explore two types of exotic decays: 1. Two-Proton (2p) Radioactivity: This decay mode, a unique three-body process, involves the emission of two protons from ground state of even-Z neutron-deficient nuclei. We will demonstrate how the internal structure influences the decay dynamics and nucleon-nucleon correlations in the asymptotic region. 2. Nonexponential Decay Regimes in Open Quantum Systems: This domain, governed by the continuum, challenges the classical understanding of decay processes. We will introduce new expiremental observables designed to probe the post-exponential decay phase, including investigations into decay from threshold resonances, particle correlations in three-body decay scenarios, and the interference patterns arising from closely situated resonances. Through these detailed studies, we aim to provide new insights into the properties of open quantum systems.