JOURNAL ARTICLE

Casimir–Polder interaction between an atom and a Chern insulator: topological signature and long-range repulsion.

  • Published In: International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics, 2025, v. 40, n. 10/11. P. 1 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Lu, Bing-Sui 3 of 3

Abstract

We consider the Casimir–Polder interaction between a two-level atomic system and a Chern insulator for both the resonant and nonresonant channels. For a right circularly polarized excited atomic state near a Chern insulator with a negative Chern number C, the resonant Casimir–Polder force can be monotonically repulsive over a large range of separations. In the presence of the same Chern insulator, a right circularly polarized metastable atomic state is expected to experience a repulsive nonresonant Casimir–Polder force over a certain range of atom-surface separations in the far-field region. At still greater separations, the nonresonant Casimir–Polder force is expected to become attractive and exhibit a topological signature, being proportional to (C α) 2 / (1 + (C α) 2) , where α is the fine-structure constant. [ABSTRACT FROM AUTHOR]

Additional Information

  • Source:International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics. 2025/04, Vol. 40, Issue 10/11, p1
  • Document Type:Article
  • Subject Area:Physics
  • Publication Date:2025
  • ISSN:0217-751X
  • DOI:10.1142/S0217751X25430110
  • Accession Number:184560458
  • Copyright Statement:Copyright of International Journal of Modern Physics A: Particles & Fields; Gravitation; Cosmology; Nuclear Physics is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

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