Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\phi^4$ inflation is not excluded   We present counter examples to the claim that the $\lambda \phi^4$ inflaton
potential is excluded by recent cosmological data. Finding counter examples
requires that the actually observed primordial fluctuations are generated at
the onset of the slow-roll regime of inflation. This set up for the initial
conditions is therefore different from the usual scenario of chaotic inflation
where inflation starts long before the observed fluctuations are created. The
primordial power spectrum of "just enough" chaotic inflation violates
scale-invariance in a way consistent with observations.

29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs