Bubble-wall Casimir interaction in fermionic environments

Antonino Flachi, Lee Peng Teo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We consider the Casimir interaction mediated by massless fermions, between a spherical defect and a flat potential barrier, assuming hard (bag-type) boundary conditions at both the barrier and the surface of the sphere. The computation of the quantum interaction energy is carried out using the multiple scattering approach adapted here to the setup in question. We find an exact integral formula for the energy, from which we extract both the large- and short-distance asymptotic behavior. At large distance the fermionic contribution is found to scale as L-3, in contrast to that of electromagnetic vacuum fluctuations that, assuming perfectly conducting boundaries, scale as L-4. At short distance, we compute the leading and subleading contribution to the vacuum energy. The leading one coincides with what it is expected from the proximity force approximation, while the subleading term gives, contrary to the electromagnetic case, a positive correction to the proximity force result.

Original languageEnglish
Article number025032
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number2
Publication statusPublished - 2015 Jul 20
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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