Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum fluctuation of stress tensor in a higher-derivative scalar field
  theory around a cosmic string   We calculate the vacuum fluctuation of the stress tensor of a
higher-derivative theory around a thin cosmic string. To this end, we adopt the
method to obtain the stress tensor from the effective action developed by
Gibbons et al. By their method, the quantum stress tensor of higher-derivative
scalar theories without self-interaction is expressed as a simple sum of
quantum stress tensors of free massive scalar fields. Unlike the vacuum
expectation value of the scalar field squared obtained in the similar model,
there appears no reduction of the values near the conical singularity.

10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph