Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Possible observational windows for quantum effects from black holes   Quantum information transfer necessary to reconcile black hole evaporation
with quantum mechanics, while approximately preserving regular near-horizon
geometry, can be simply parameterized in terms of couplings of the black hole
internal state to quantum fields of the black hole atmosphere. The necessity of
transferring sufficient information for unitarization sets the strengths of
these couplings. Such couplings via the stress tensor offer apparently
significant advantages, and behave like quantum fluctuations of the effective
metric near the horizon. At the requisite strength, these fluctuations, while
soft (low energy/momentum), have significant magnitude, and so can deflect
near-horizon geodesics that span distances of order the black hole radius.
Thus, the presence of such couplings can result in effects that could be
detected or constrained by observation: disruption of near-horizon accretion
flows, scintillation of light passing close to the black hole, and alteration
of gravitational wave emission from inspirals. These effects could in
particular distort features of Sgr A* expected to be observed, e.g., by the
Event Horizon Telescope, such as the black hole shadow and photon ring.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
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The categories of this paper are: stat
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph