Towards an understanding of dipole-dipole interactions in nonlocal media

• URL: http://arxiv.org/abs/2512.22041v1
• Date: Fri, 26 Dec 2025 14:31:23 GMT
• Title: Towards an understanding of dipole-dipole interactions in nonlocal media
• Authors: L. Inácio, A. Kurumbail, S. K. Panja, I. Brevik, M. Boström,
• Abstract summary: We review how background media change atom-atom excited-state systems.<n>We predict that a new contribution to the resonance interaction energy emerges in a form $propto e-_rm D /$.<n>The long-range electrolyte-induced resonance interaction at finite temperature may, in addition to the dominating van der Waals attraction, take part in the molecular formation of biological fluids.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: We commence our study with review of dispersion interactions in electrolytes. We then reflect on how background media change atom-atom excited-state systems. To highlight the impact of nonlocal media, such as salt solutions, we predict that a new contribution to the resonance interaction energy emerges in a form $\propto e^{-κ_{\rm D} ρ}/ρ$. Here $κ_{\rm D}$ is the Debye length and $ρ$ is the distance between the atoms. This contribution vanishes at zero temperature, where a new term proportional to $1/ρ^4$ (similar to free space) occurs. This new term is dampened by the electrolyte at large distances, causing it to decrease much faster, proportional to $1/ρ^7$. The long-range electrolyte-induced resonance interaction at finite temperature may, in addition to the dominating van der Waals attraction (which goes as $1/ρ^6$), take part in the molecular formation of biological fluids.

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