What the study found
The study found that repetitive Penrose process behavior in Kerr-de Sitter black holes differs from that in Kerr black holes in several ways. In particular, Kerr-de Sitter black holes can show higher energy return on investment and higher single-extraction energy capability, and these outcomes vary with the cosmological parameter and decay radius.
Why the authors say this matters
The authors say the work extends earlier findings on repetitive Penrose processes in black holes to the Kerr-de Sitter case. The study suggests that the cosmological parameter influences how much energy can be extracted and how efficiently the process works.
What the researchers tested
The researchers studied the repetitive Penrose process in Kerr-de Sitter black holes and examined how the cosmological parameter affects it. They compared the results with Kerr black holes and looked at energy return on investment, single-extraction energy capability, energy utilization efficiency, and extracted energy across different decay radii.
What worked and what didn't
The results show that Kerr-de Sitter black holes have higher energy return on investment and higher single-extraction energy capability than Kerr black holes. The larger the cosmological parameter, the stronger these two measures became. At lower decay radius, Kerr black holes had higher energy utilization efficiency and more extracted energy after the repetitive Penrose process finished, but at higher decay radius the Kerr-de Sitter black hole showed higher values because of the stopping condition of the iteration.
What to keep in mind
The abstract does not describe experimental limitations or observational data. The comparison is limited to the repetitive Penrose process, Kerr and Kerr-de Sitter black holes, and the variables named in the abstract.
Key points
- Kerr-de Sitter black holes can have higher energy return on investment than Kerr black holes in the repetitive Penrose process.
- A larger cosmological parameter strengthens the energy return on investment and single-extraction energy capability.
- At lower decay radius, Kerr black holes show higher energy utilization efficiency and more extracted energy after completion.
- At higher decay radius, Kerr-de Sitter black holes show higher energy utilization efficiency and more extracted energy.
- The differences are linked in the abstract to the stopping condition of the iteration.
Disclosure
- Research title:
- Kerr-de Sitter black holes show stronger repetitive Penrose energy performance
- Authors:
- Ke Wang, Xiao-Xiong Zeng
- Institutions:
- Chongqing Jiaotong University, Chongqing Normal University
- Publication date:
- 2026-04-24
- OpenAlex record:
- View
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