A little excitement across the horizon

Ng, Keith K.; Zhang, Chen; Louko, Jorma; Mann, Robert B.

Abstract

We analyse numerically the transitions in an Unruh-DeWitt detector, coupled linearly to a massless scalar field, in radial infall in (3 + 1)-dimensional Schwarzschild spacetime. In the Hartle-Hawking and Unruh states, the transition probability attains a small local extremum near the horizon-crossing and is then moderately enhanced on approaching the singularity. In the Boulware state, the transition probability drops on approaching the horizon. The unexpected near-horizon extremum arises numerically from angular momentum superpositions, with a deeper physical explanation to be found.

Citation

Ng, K., Ng, K. K., Zhang, C., Louko, J., & Mann, R. B. (2022). A little excitement across the horizon. New Journal of Physics, 24(10), Article 103018. https://doi.org/10.1088/1367-2630/ac9547

• Journal Article Type: Article
• Acceptance Date: Sep 27, 2022
• Online Publication Date: Oct 21, 2022
• Publication Date: Oct 1, 2022
• Deposit Date: Oct 26, 2022
• Publicly Available Date: Oct 26, 2022
• Journal: New Journal of Physics
• Electronic ISSN: 1367-2630
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 24
• Issue: 10
• Article Number: 103018
• DOI: https://doi.org/10.1088/1367-2630/ac9547
• Keywords: General Physics and Astronomy
• Public URL: https://nottingham-repository.worktribe.com/output/11756062
• Publisher URL: https://iopscience.iop.org/article/10.1088/1367-2630/ac9547