Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solution of the fermionic entanglement problem with interface defects   We study the ground-state entanglement of two halves of a critical transverse
Ising chain, separated by an interface defect. From the relation to a
two-dimensional Ising model with a defect line we obtain an exact expression
for the continuously varying effective central charge. The result is relevant
also for other fermionic chains.

29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph