Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Wentzell boundary conditions and quantum field theory   We discuss a free scalar field subject to generalized Wentzell boundary
conditions. On the classical level, we prove well-posedness of the Cauchy
problem and in particular causality. Upon quantization, we obtain a field that
may naturally be restricted to the boundary. We discuss the holographic
relation between this boundary field and the bulk field.

32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph