Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some recent results in scalar quantum field theory in globally
  hyperbolic asymptotically flat spacetimes   Some recent results obtained by the author and collaborators about QFT in
asymptotically flat spacetimes at null infinity are summarized and reviewed. In
particular it is focused on the physical properties of ground states in the
bulk induced by the BMS-invariant state defined at null infinity.

16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an