Nonresonant Casimir-Polder repulsion with a monolayer topological insulator
arXiv:2503.13955 · doi:10.1209/0295-5075/add36e
Abstract
We investigate the behavior of the nonresonant Casimir-Polder force acting on a metastable polarized state of a two-level atomic system with a right-circularly polarized electric dipole transition in the presence of a monolayer topological insulator inhabiting an anomalous quantum Hall insulator state with a negative Chern number, finding that the force can be repulsive for a certain range within the far-field region. By considering stanene irradiated by circularly polarized monochromatic laser light as a material example of a monolayer topological insulator, we study the effect of the frequency dispersion in the conductivity tensor on the force behavior, finding that the dispersion generally leads to a slight downward shift of the force relative to that predicted by a nondispersive approximation, as well as a slight reduction of the range over which the force is repulsive.
arXiv commentInvited contribution to EPL's Focus Issue on "Casimir Effect and Its Role in Modern Physics"; 7 pages, 4 figures
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