Towards an understanding of dipole-dipole interactions in nonlocal media
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918264124211200 |
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| author | Inácio, L. Kurumbail, A. Panja, S. K. Brevik, I. Boström, M. |
| author_facet | Inácio, L. Kurumbail, A. Panja, S. K. Brevik, I. Boström, M. |
| contents | 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. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_22041 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Towards an understanding of dipole-dipole interactions in nonlocal media Inácio, L. Kurumbail, A. Panja, S. K. Brevik, I. Boström, M. Quantum Physics Mesoscale and Nanoscale Physics Atomic Physics 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. |
| title | Towards an understanding of dipole-dipole interactions in nonlocal media |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Atomic Physics |
| url | https://arxiv.org/abs/2512.22041 |