Comment on Self-Stress on a Dielectric Ball and Casimir-Polder Forces
Ulf Leonhardt
TL;DR
This paper clarifies previous claims about Casimir stress on dielectric spheres, addressing criticisms and defending the validity of the original calculations within the context of dispersionless dielectrics.
Contribution
It provides a clarification and defense of the original calculation of Casimir stress on dielectric spheres against recent criticisms.
Findings
The original Casimir stress calculations are valid within the assumptions.
Criticisms regarding the mathematical steps are addressed and rebutted.
The paper reaffirms the conventional understanding of Casimir forces in this context.
Abstract
In our paper [Ann. Phys. (NY) 395, 326 (2018)] we calculate the Casimir stress on a sphere immersed in a homogeneous background, assuming dispersionless dielectrics. Our results appear to challenge the conventional picture of Casimir forces. The paper [arXiv:1909.05721] criticises our approach without offering an alternative. In particular, the paper [arXiv:1909.05721] claims that we have made an unjustified mathematical step. This brief comment clarifies the matter.
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Taxonomy
TopicsQuantum Electrodynamics and Casimir Effect · Mechanical and Optical Resonators · Experimental and Theoretical Physics Studies