Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Levels of spacetime emergence in quantum gravity   We explore the issue of spacetime emergence in quantum gravity, by
articulating several levels at which this can be intended. These levels
correspond to the reconstruction moves that are needed to recover the classical
and continuum notion of space and time, which are progressively lost in a
progressively deeper sense in the more fundamental quantum gravity description.
They can also be understood as successive steps in a process of widening of the
perspective, revealing new details and new questions at each step. Each level
carries indeed new technical issues and opportunities, and raises new
conceptual issues. This deepens the scope of the debate on the nature of
spacetime, both philosophically and physically.

15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an