Boulware vacuum vs regularity: Thoughts on anomaly-induced effective action
We examine the vacuum state and its corresponding renormalized stress-energy tensor (RSET) in static horizonless regular spacetime in both two and four dimensions. Using the local field formulation of the anomaly-induced effective action, we show that the regularities of the spacetime and the RSET dictate the appropriate vacuum state. Furthermore, through a case study under the horizonless Bardeen-type spacetime, we demonstrate that the preferred vacuum state is not the Boulware vacuum, but a nontrivial one with a different RSET profile.
Authors
- Kazumasa Okabayashi (ORCID: https://orcid.org/0000-0003-1874-7797)
- Shinji Mukohyama (ORCID: https://orcid.org/0000-0002-9934-2785)
- Kota Numajiri (ORCID: https://orcid.org/0000-0003-2064-624X)
Institutions
- Kavli Institute for the Physics and Mathematics of the Universe (JP)
- Kyoto University (JP)
- Instituto de Física Teórica (ES)
- Yukawa Institute for Theoretical Physics (JP)
- Nagoya University (JP)
- The University of Tokyo (JP)
Publication Details
- Journal
- Physical review. D/Physical review. D.
- Published
- 2025-04-17
- DOI
- https://doi.org/10.1103/physrevd.111.085024
- Citations
- 2
- Primary Topic
- Cosmology and Gravitation Theories
- Type
- article
- Field-Weighted Citation Impact
- 2.31
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Japan Society for the Promotion of Science