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arXiv · 2410.01258

Non-Hermitian ultra-strong bosonic clustering through interaction-induced caging

Mengjie Yang·Luqi Yuan·Ching Hua Lee
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Abstract

We uncover a new mechanism whereby the triple interplay of non-Hermitian pumping, bosonic interactions and nontrivial band topology leads to ultra-strong bosonic condensation. The extent of condensation goes beyond what is naively expected from the interaction-induced trapping of non-Hermitian pumped states, and is based on an emergent caging mechanism that can be further enhanced by topological boundary modes. Beyond our minimal model with 2 bosons, this caging remains applicable for generic many-boson systems subject to a broad range of density interactions and non-Hermitian hopping asymmetry. Our novel new mechanism for particle localization and condensation would inspire fundamental shifts in our comprehension of many-body non-Hermitian dynamics and opens new avenues for controlling and manipulating bosons.

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Mengjie Yang, Luqi Yuan, Ching Hua Lee. 2024-10-02. Non-Hermitian ultra-strong bosonic clustering through interaction-induced caging. https://doi.org/10.1038/s42005-025-02274-z

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