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<p>Guiding how interacting bosons gather at system boundaries underpins emerging quantum technologies. However, how the triple interplay of directional non-Hermitian hopping, bosonic repulsion, and band topology shapes such clustering is still not fully understood. Here we show that these ingredients cooperate to produce an emergent “cage” that traps bosons at a lattice edge, yielding system boundary densities far beyond those from interaction-induced trapping alone. This caging extends from our two-boson minimal model to many-body systems over broad interaction strengths and hopping asymmetries. The mechanism offers a general strategy to pin correlated particles without external barriers and could inform future designs of robust edge memories and energy-efficient transport devices.</p>

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Non-Hermitian strong bosonic clustering through interaction-induced caging

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月30日

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  • Mengjie Yang,
  • Luqi Yuan,
  • Ching Hua Lee

摘要

Guiding how interacting bosons gather at system boundaries underpins emerging quantum technologies. However, how the triple interplay of directional non-Hermitian hopping, bosonic repulsion, and band topology shapes such clustering is still not fully understood. Here we show that these ingredients cooperate to produce an emergent “cage” that traps bosons at a lattice edge, yielding system boundary densities far beyond those from interaction-induced trapping alone. This caging extends from our two-boson minimal model to many-body systems over broad interaction strengths and hopping asymmetries. The mechanism offers a general strategy to pin correlated particles without external barriers and could inform future designs of robust edge memories and energy-efficient transport devices.