Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emergence of time   Microphysical laws are time reversible, but macrophysics, chemistry and
biology are not. This chapter explores how this asymmetry (a classic example of
a broken symmetry) arises due to the cosmological context, where a non-local
Direction of Time is imposed by the expansion of the universe. This situation
is best represented by an Evolving Block Universe, where local arrows of time
(thermodynamic, electrodynamic, gravitational, wave, quantum, biological)
emerge in concordance with the Direction of Time because a global Past
Condition results in the Second Law of Thermodynamics pointing to the future.
At the quantum level, the indefinite future changes to the definite past due to
quantum wave function collapse events.

6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio