稳态储层介导的极化激元凝聚体自俘获
Steady reservoir-mediated self-trapping of polariton condensates
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中文总结 AI 辅助
本文提出凝聚体对激子储层的反作用导致局部耗尽，形成稳态自俘获态，由汇聚流维持且低于凝聚阈值，最终因不稳定性射出，可用于神经形态计算。
中文摘要 AI 辅助
由紧密聚焦的非相干光束产生的激子-极化激元非平衡玻色凝聚体通常预期会形成静止的弹道膨胀态，但实验观测到的紧凑自俘获态是一个显著例外[Phys. Rev. Lett. 123, 047401 (2019)]。我们表明，凝聚体通过玻色子受激散射对光泵浦激子储层的反作用可导致局部储层耗尽，从而产生一个被限制在自感应势阱中的稳态凝聚体。值得注意的是，这种自俘获态由持续的汇聚而非径向膨胀的极化激元流形成，并且即使在传统定义的凝聚阈值以下也存在。该状态在纳秒时间尺度上保持稳定，并最终由于子弹型不稳定性而从自感应势阱中射出，从而在极化激元凝聚体网络中实现尖峰神经形态动力学。
英文摘要
Nonequilibrium bosonic condensates of exciton-polaritons generated by tightly focused incoherent optical beams are typically expected to form a stationary ballistically expanding state with the notable exception of experimentally observed compact self-trapped states [Phys. Rev. Lett. 123, 047401 (2019)]. We show that the back-action of the condensate on the optically pumped excitonic reservoir via bosonic stimulated scattering can cause local reservoir depletion, producing a steady condensate confined in a self-induced potential trap. Notably, this self-trapped state is formed by persistent converging rather than radially expanding polariton currents and exists even below the conventionally defined condensation threshold. This state remains steady over nanosecond-scale times and is eventually ejected from the self-induced trap due to a bullet-type instability, enabling spiking neuromorphic dynamics in networks of polariton condensates.
发表机构
- MIPT（莫斯科物理技术学院）
- Saint-Petersburg State University（圣彼得堡国立大学）
- Korea Advanced Institute of Science and Technology (KAIST)（韩国科学技术院）
- Institute for Basic Science (IBS)（基础科学研究院）
- The Pennsylvania State University（宾夕法尼亚州立大学）
- Russian Quantum Center（俄罗斯量子中心）
机构由 AI 辅助整理，请以论文原文为准。
