A Little Excitement Across the Horizon

• URL: http://arxiv.org/abs/2109.13260v4
• Date: Mon, 24 Oct 2022 13:42:32 GMT
• Title: A Little Excitement Across the Horizon
• Authors: Keith K. Ng, Chen Zhang, Jorma Louko, Robert B. Mann
• Abstract summary: 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. The unexpected near-horizon extremum arises numerically from angular momentum superpositions, with a deeper physical explanation to be found.
• Score: 3.8004522354603143
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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