On a possible method of Casimir pressure renormalization in a ball

摘要

We propose a method of Casimir pressure renormalization for massive scalar field in a ball. This method is slightly different from the generally accepted methods. An alternative way of choosing the normalization point leads to an exponential pressure dependence on the mass of the field instead of an inverse polynomial dependence. The proposed method does not use the scalar quantized field in the exterior domain. This allows us to bypass the difficulties that appear when one uses the standard approach.