Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scalar Field Dark Energy Perturbations and their Scale Dependence   We estimate the amplitude of perturbation in dark energy at different length
scales for a quintessence model with an exponential potential. It is shown that
on length scales much smaller than hubble radius, perturbation in dark energy
is negligible in comparison to that in in dark matter. However, on scales
comparable to the hubble radius ($\lambda_{p}>1000\mathrm{Mpc}$) the
perturbation in dark energy in general cannot be neglected. As compared to the
$\Lambda$CDM model, large scale matter power spectrum is suppressed in a
generic quintessence dark energy model. We show that on scales $\lambda_{p} <
1000\mathrm{Mpc}$, this suppression is primarily due to different background
evolution compared to $\Lambda$CDM model. However, on much larger scales
perturbation in dark energy can effect matter power spectrum significantly.
Hence this analysis can act as a discriminator between $\Lambda$CDM model and
other generic dark energy models with $w_{de} \neq -1$.

33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn