Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signal photon flux generated by high-frequency relic gravitational waves   The power spectrum of primordial tensor perturbations $\mathcal{P}_t$
increases rapidly in high frequency region if the spectral index $n_t>0$. It is
shown that the amplitude of relic gravitational wave $h_t$($5\times10^9$Hz)
varies from $10^{-36}$ to $10^{-25}$ while $n_t$ varies from $-6.25\times
10^{-3}$ to $0.87$. High frequency gravitational waves detector that is
proposed by F.-Y. Li detects gravitational waves through observing the
perturbed photon flux that is generated by interaction between the relic
gravitational waves and electromagnetic system. It is shown that the
perturbative photon flux $N_x^1$($5\times10^9$Hz) varies from
$1.40\times10^{-4}\rm s^{-1}$ to $2.85\times10^{7}\rm s^{-1}$ while $n_t$
varies from $-6.25\times 10^{-3}$ to $0.87$. Correspondingly, the ratio of the
transverse perturbative photon flux $N_x^1$ to the background photon flux
varies from $10^{-28}$ to $10^{-16}$.

35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph