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Open Quantum Systems Decoherence

Most Subradiant Bound Photon Pairs from Chirality-Mediated Dispersion Softening

arXiv
Authors: Kailin Tan, Xuanbing Jiang, Dong Wang, Saijun Wu

Year

2026

Paper ID

68025

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

We study the subradiant bound states (BSs) in a two-level atom array chirally coupled to a one-dimensional waveguide. We demonstrate that the chiral interaction can drive BSs to become the most subradiant two-excitation states across a wide spacing range. This phenomenon is rooted in a mechanism of chirality-mediated dispersion softening, where the BS band distortion suppresses the band curvature |α2| at an extremum point. We rigorously prove that the BS decay rate follows the scaling Γsim |α2|/N3, revealing that the reduction of |α2| is key to suppressing emission and enhancing subradiance. We also show the existence of chiral BSs in a realistic nanofiber interface.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We study the subradiant bound states (BSs) in a two-level atom array chirally coupled to a one-dimensional waveguide.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2606.01146 [2] arXiv https://arxiv.org/abs/2606.01146 [3] Publisher https://arxiv.org/abs/2606.01146

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