Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir

• URL: http://arxiv.org/abs/2601.12880v1
• Date: Mon, 19 Jan 2026 09:35:33 GMT
• Title: Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir
• Authors: Heng-Na Xiong, Da-Wei Ye, Yang Yang, Hongli Zhu, Yixiao Huang, Stefano Longhi, Fanxin Liu,
• Abstract summary: We show a robust scheme for quantum information storage based on bound states in a two-dimensional coupled-cavity array.<n>In the weak-coupling regime, the BIC dominates, enabling perfect and persistent information storage.<n>Results, valid at both zero and finite reservoir temperatures, highlight the potential of photonic lattices for scalable all-optical decoherence-free quantum memory platforms.
• Score: 3.777322343288414
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We demonstrate a robust scheme for quantum information storage based on bound states in a two-dimensional coupled-cavity array. When a target cavity is tuned to resonance with the array, a bound state in the continuum (BIC) emerges, coexisting with two conventional bound states outside the band. The resulting dynamics reflects a delicate interplay between these bound states, which can be fully captured through exact analytical solutions. In the weak-coupling regime, the BIC dominates, enabling perfect and persistent information storage. At stronger coupling, all bound states contribute, leading to oscillatory behavior and reduced storage fidelity. These results, valid at both zero and finite reservoir temperatures and further supported by a single-particle framework, reveal distinctive non-Markovian features in continuous-variable systems and highlight the potential of photonic lattices for scalable all-optical decoherence-free quantum memory platforms.

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