Radiative properties of a linear chain of coupled qubits

Details Radiative properties of a linear chain of coupled qubits Radiative properties of a linear chain of coupled qubits

2007-04-26

arxiv.org/abs/0704.3470v1

J. Phys. B: At. Mol. Opt. Phys. 40 (2007) S181-S197

Physics

Quantum Physics

20 pages, 11 figures

Scientific paper

10.1088/0953-4075/40/9/S11

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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