Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Abruption decay of entanglement and quantum communication through noise
  channels   We investigate the dynamics of two qubits state through the Bloch channel.
  It is found that the degradation and sudden-death of the entanglement depend
on the channel's parameters and the structure of the input state. Starting from
partially entangled states as input state, the output states are more robust
compared with those obtained from initial maximally entangled states. Also the
survivability of entanglement increased as the absolute equilibrium values of
the channel increased or the ratio between the longitudinal and transverse
relaxation times gets smaller. Ability of using the output states as quantum
channels to perform quantum teleportation is investigated. The idea that the
useful output states are used to achieve the original quantum teleportation
protocol is discussed.

31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas