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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Bibliographic Details
Published in:	Nanophotonics (Berlin, Germany) Germany), 2024-01, Vol.13 (3), p.289-298
Main Authors:	Volkov, Ilya A., Ustimenko, Nikita A., Kornovan, Danil F., Sheremet, Alexandra S., Savelev, Roman S., Petrov, Mihail I.
Format:	Article
Language:	eng
Subjects:	Arrays atomic lattices Atomic properties collective quantum excitations Data processing Eigenvectors Electric fields Emission analysis Emitters external coupling flat bands Quantum phenomena Radiative lifetime Spontaneous emission subradiance Symmetry
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Summary:	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 scaled with the total number of atoms
ISSN:	2192-8606 2192-8614