Subradiance in dilute atomic ensembles: Role of pairs and multiple scattering

Fofanov, Ya. A.; Sokolov, I. M.; Kaiser, Robin; Guerin, William

doi:10.1103/physreva.104.023705

Cited by 10 publications

(1 citation statement)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We furthermore observe numerically that this value closely coincides with the total excited state population remaining divided by the atom number, P k (t)/N (dashed purple curves). The slow decay of population P k (t) at long times is an effect that has been studied extensively in recent years, and is known as late-time subradiance [26,32,50,61,[64][65][66]. While a microscopic derivation is difficult, a heuristic argument can be made that the remaining population should be roughly equally distributed throughout the ensemble, given a smooth initial distribution.…”

Section: Spin-wave Dephasingmentioning

confidence: 99%

Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium

Grava

et al. 2022

New J. Phys.

View full text Add to dashboard Cite

While typical theories of atom-light interactions treat the atomic medium as being smooth, it is well-known that microscopic optical effects driven by atomic granularity, dipole-dipole interactions, and multiple scattering can lead to important effects. Recently, for example, it was experimentally observed that these ingredients can lead to a fundamental, density-dependent dephasing of optical spin waves in a disordered atomic medium. Here, we go beyond the short-time and dilute limits considered previously, to develop a comprehensive theory of dephasing dynamics for arbitrary times and atomic densities. In particular, we develop a novel, non-perturbative theory based on strong disorder renormalization group, in order to quantitatively predict the dominant role that near-field optical interactions between nearby neighbors has in driving the dephasing process. This theory also enables one to capture the key features of the many-atom dephasing dynamics in terms of an effective single-atom model. These results should shed light on the limits imposed by near-field interactions on quantum optical phenomena in dense atomic media, and illustrate the promise of strong disorder renormalization group as a method of dealing with complex microscopic optical phenomena in such systems.

show abstract

Section: Spin-wave Dephasingmentioning

confidence: 99%

Renormalization group analysis of near-field induced dephasing of optical spin waves in an atomic medium

Grava

et al. 2022

New J. Phys.

View full text Add to dashboard Cite

show abstract

Non-radiative configurations of a few quantum emitters ensembles: Evolutionary optimization approach

Volkov,

Mitsai,

Zhogolev

et al. 2024

Applied Physics Letters

View full text Add to dashboard Cite

Suppressing the spontaneous emission in quantum emitters ensembles (atoms) is one of the topical problems in quantum optics and quantum technology. While many approaches are based on utilizing the subradiance effect in ordered quantum emitters arrays, the ensemble configurations providing the minimal spontaneous emission rate are yet unknown. In this work, we employ the differential evolution algorithm to identify the optimal configurations of a few atomic ensembles that support quantum states with maximal radiative lifetime. We demonstrate that atoms tend to assemble mostly in quasi-regular structures with specific geometry, which strongly depends on the minimally allowed interatomic distance rmin. While the discovered specific non-radiative realizations of small ensembles cannot be immediately predicted, there is particular correspondence to the non-radiative states in the atomic lattices. In particular, we have found that states inheriting their properties either from the bound states in the continuum or band edge states of infinite lattices dominate across a wide range of rmin values. Additionally, we show that for small interatomic distances, the linear arrays with modulated spacing have the smallest radiative losses exponentially decreasing as the size of the ensemble increases.

show abstract