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- W3102079391 abstract "We calculate the free-fall energy density of scalar fields semi-classically by employing the trace anomaly on a two-dimensional Schwarzschild black hole with respect to various black hole states in order to clarify whether something special at the horizon happens or not. For the Boulware state, the energy density at the horizon is always negative divergent, which is independent of initial free-fall positions. However, in the Unruh state the initial free-fall position is responsible for the energy density at the horizon and there is a critical point to determine the sign of the energy density at the horizon. In particular, a huge negative energy density appears when the freely falling observer is dropped just near the horizon. For the Hartle-Hawking state, it may also be positive or negative depending on the initial free-fall position, but it is always finite. Finally, we discuss physical consequences of these calculations." @default.
- W3102079391 created "2020-11-23" @default.
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- W3102079391 date "2014-12-28" @default.
- W3102079391 modified "2023-10-13" @default.
- W3102079391 title "Something special at the event horizon" @default.
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- W3102079391 doi "https://doi.org/10.1142/s0217732314502150" @default.
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