Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiative properties of a linear chain of coupled qubits   We calculate the radiative properties for a linear dipole-coupled chain of
qubits. Using the explicit energy eigenstates of the system, we find the
radiation patterns for spontaneous transitions from the one-photon eigenstates
to the ground state of the system. We show that depending on the excitation of
a specific atom, the radiation tends to be focused either along or
perpendicular to the chain. We conclude with a derivation of the total decay
rate of the one-photon eigenstates, and find the interesting result that for
systems where the photon wavenumber is not much larger than the interatomic
spacing, up to 94% of the eigenstates are subradiant, that is, they decay
significantly slower than a single atom in isolation.

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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
2
The categories of this paper are: math