Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A comparative study of system size dependence of the effect of
  non-unitary channels on different classes of quantum states   We investigate the effect of different types of non-unitary quantum channels
on multi-qubit quantum systems. For an $n$-qubit system and a particular
channel, in order to draw unbiased conclusions about the system as a whole as
opposed to specific states, we evolve a large number of randomly generated
states under the given channel. We increase the number of qubits and study the
effect of system size on the decoherence processes. The entire scheme is
repeated for various types of environments which include dephasing channel,
depolarising channel, collective dephasing channel and zero temperature bath.
Non-unitary channels representing the environments are modeled via their Karus
operator decomposition or master equation approach. Further, for a given $n$ we
restrict ourselves to the study of particular subclasses of entangled states,
namely the GHZ-type and W-type states. We generate random states within these
classes and study the class behaviors under different quantum channels for
various values of $n$.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph