Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relic Dark energy from Trans-Planckian Regime   As yet, there is no underlying fundamental theory for the transplanckian
regime. There is a need to address the issue of how the observables in our
present universe are affected by processes that may have occured during the
transplanckian regime. A particular feature of the family of dispersion
functions chosen is the production of ultralow frequencies at very high momenta
$k> M_P$. We name the range of the ultralow energy modes (of very short
distances) that have frequencies equal or less than the current Hubble rate
$H_0$ as the $\it{tail}$ modes. These modes are still frozen today due to the
expansion of the universe. We calculate their energy today and show that the
$tail$ provides a strong candidate for the {\it dark energy} of the universe.
During inflation, their energy is about 122-123 orders of magnitude smaller
than the total energy. We present the exact solutions and show that: the CMBR
spectrum is that of a (nearly) black body, and that the adiabatic vacuum is the
only choice for the initial conditions. Finally, some of these results can also
be applied to black hole physics.

34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th