Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black hole complementarity and firewall in two dimensions   In connection with black hole complementarity, we study the possibility of
the duplication of information in the RST model which is an exactly soluble
quantized model in two dimensions. We find that the duplication of information
can be observed without resort to assuming an excessively large number of
scalar fields. If we introduce a firewall, then we can circumvent this problem;
however, the firewall should be outside the event horizon.

10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
2
The categories of this paper are: math
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an