Resonant Dipole-Dipole Interactions in Electromagnetically Induced Transparency

• URL: http://arxiv.org/abs/2112.02790v4
• Date: Thu, 26 May 2022 01:24:19 GMT
• Title: Resonant Dipole-Dipole Interactions in Electromagnetically Induced Transparency
• Authors: H. H. Jen, G.-D. Lin, and Y.-C. Chen
• Abstract summary: We theoretically investigate the role of RDDI in electromagnetically induced transparency (EIT) The resonant dipole-dipole interactions manifest in the cooperative spontaneous emission of the probe light transition. We find that EIT transparency window becomes narrower as the cooperative linewidth increases, which essentially reduces the storage efficiency of slow light as EIT-based quantum memory application.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Resonant dipole-dipole interaction (RDDI) is ubiquitous in light-matter interacting systems and is responsible for many fascinating properties of collective radiations. Here we theoretically investigate the role of RDDI in electromagnetically induced transparency (EIT). The resonant dipole-dipole interactions manifest in the cooperative spontaneous emission of the probe light transition, which give rise a broadened linewidth and associated collective frequency shift. This cooperative linewidth originates from the nonlocal and long-range RDDI, which can be determined by the atomic density, optical depth, and macroscopic length scales of the atomic ensemble. We present that EIT spectroscopy essentially demonstrates all-order multiple scattering of RDDI. Furthermore, we find that EIT transparency window becomes narrower as the cooperative linewidth increases, which essentially reduces the storage efficiency of slow light as EIT-based quantum memory application.

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