Semiclassical cosmic string evaporation
Fuente:
arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914107532247040 |
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| author | Penna, Robert |
| author_facet | Penna, Robert |
| contents | We describe a new tunneling solution for the decay of a cosmic string into a burst of gravitational waves. We find the relevant instanton and compute the tunneling rate. Locally, our solution is just an analytic continuation of the Kerr metric (but there is no black hole in our solution). An interesting feature of our result is that there is a conical singularity in the initial state but there is no singularity in the final state. This demonstrates that singularities can disappear in quantum gravity in ways that are impossible in classical gravity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18948 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Semiclassical cosmic string evaporation Penna, Robert High Energy Physics - Theory General Relativity and Quantum Cosmology We describe a new tunneling solution for the decay of a cosmic string into a burst of gravitational waves. We find the relevant instanton and compute the tunneling rate. Locally, our solution is just an analytic continuation of the Kerr metric (but there is no black hole in our solution). An interesting feature of our result is that there is a conical singularity in the initial state but there is no singularity in the final state. This demonstrates that singularities can disappear in quantum gravity in ways that are impossible in classical gravity. |
| title | Semiclassical cosmic string evaporation |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2510.18948 |