Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Overcoming Quantum Noise in Optical Fibers   Noise in optical Telecom fibers is an important limitation on optical quantum
data transmission. Unfortunately, the classically successful amplifiers (such
as EDFA) cannot be used in quantum communication because of the no-cloning
theorem. We propose a simple method to reduce quantum noise: the insertion of
phase-shifters and/or beam-splitters at regular distance intervals into a
fiber. We analyze in detail the case of qubits encoded into polarization states
of low-intensity light, which is of central importance to various quantum
information tasks, such as quantum cryptography and communication. We discuss
the experimental feasibility of our scheme and propose a simple experiment to
test our method.

15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs