Strongly subradiant states in planar atomic arrays
The optically trapped ensembles of atoms provide a versatile platform for storing and coherent manipulation of quantum information. However, efficient realization of quantum information processing requires long-lived quantum states protected from the decoherence e.g. via spontaneous emission. Here,...
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Zusammenfassung: | The optically trapped ensembles of atoms provide a versatile platform for
storing and coherent manipulation of quantum information. However, efficient
realization of quantum information processing requires long-lived quantum
states protected from the decoherence e.g. via spontaneous emission. Here, we
theoretically study collective dipolar oscillations in finite planar arrays of
quantum emitters in free space and analyze mechanisms that govern the emergence
of strongly subradiant collective states. We demonstrate that the external
coupling between the collective states associated with the symmetry of the
array and with the quasi-flat dispersion of the corresponding infinite lattice
plays a crucial role in the boost of their radiative lifetime. We show that
among different regular arrangements of the atoms the square atomic arrays
support eigenstates with minimal radiative losses that scale with the total
number of atoms $N_{tot}$ as $\propto N_{tot}^{-5}$. |
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DOI: | 10.48550/arxiv.2310.06791 |