Quantum interference initiated super- and subradiant emission from entangled atoms

Details Quantum interference initiated super- and subradiant emission from entangled atoms Quantum interference initiated super- and subradiant emission from entangled atoms

2011-04-15

arxiv.org/abs/1104.2989v2

Physics

Quantum Physics

10 pages, 8 figures, 2 Tables

Scientific paper

10.1103/PhysRevA.84.023805

We calculate the radiative characteristics of emission from a system of entangled atoms which can have a relative distance larger than the emission wavelength. We develop a quantum multipath interference approach which explains both super- and subradiance though the entangled states have zero dipole moment. We derive a formula for the radiated intensity in terms of different interfering pathways. We further show how the interferences lead to directional emission from atoms prepared in symmetric W-states. As a byproduct of our work we show how Dicke's classic result can be understood in terms of interfering pathways. In contrast to the previous works on ensembles of atoms, we focus on finite numbers of atoms prepared in well characterized states.

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