From superradiance to subradiance: exploring the many-body Dicke ladder

Glicenstein, Antoine; Ferioli, Giovanni; Browaeys, Antoine; Ferrier-Barbut, Igor

doi:10.1364/ol.451903

Cited by 11 publications

(6 citation statements)

References 27 publications

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“…The underlying, socalled timed Dicke regime has been extensively studied, both theoretically and experimentally, e.g., with ensembles of laser-cooled atoms in the optical domain [6][7][8][9][10][11][12][13][14]. However, the regime where the ensemble is highly excited or even fully inverted has only recently become accessible [15][16][17][18]. There, the theoretical description becomes increasingly complex due to the exponential scaling of the system's Hilbert space with the number of emitters [19][20][21][22][23][24][25].…”

mentioning

confidence: 99%

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Liedl¹,

Pucher²,

Tebbenjohanns³

et al. 2022

Preprint

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The collective absorption and emission of light by an ensemble of atoms is at the heart of many fundamental quantum optical effects and the basis for numerous applications. However, beyond weak excitation, both experiment and theory become increasingly challenging. Here, we explore the regimes from weak excitation to inversion with ensembles of up to one thousand atoms that are trapped and optically interfaced using the evanescent field surrounding an optical nanofiber. We realize strong inversion, with about 80 % of the atoms being excited, and study their subsequent radiative decay into the guided modes. The data is very well described by a simple model that assumes a cascaded interaction of the guided light with the atoms. Our results contribute to the fundamental understanding of the collective interaction of light and matter and are relevant for applications ranging from quantum memories to sources of nonclassical light to optical frequency standards.

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mentioning

confidence: 99%

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Liedl¹,

Pucher²,

Tebbenjohanns³

et al. 2022

Preprint

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“…Figure 4c shows the result of decay time measurement as a function of pump power. As the pump power changes the fraction of ions excited, the lifetime linearly changes with the pump power below the saturation regime 51 . We discuss these results in more detail below.…”

Section: Resultsmentioning

confidence: 99%

“…Also in arrays, excitation of subradiant states can be harder than the superradiant ones 54,56,57 due to the complicated long-range interactions and many-body features of the atomic ensembles. Both inversion and pump-induced correlations between the atoms play a role in driving superradiant states 51 . At low pump powers, the interaction energy prevents efficient population of subradiant states.…”

Section: Discussionmentioning

confidence: 99%

Long-range cooperative resonances in rare-earth ion arrays inside photonic resonators

et al. 2022

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Engineering arrays of active optical centers to control the interaction Hamiltonian between light and matter has been the subject of intense research recently. Collective interaction of atomic arrays with optical photons can give rise to directionally enhanced absorption or emission, which enables engineering of broadband and strong atom-photon interfaces. Here, we report on the observation of long-range cooperative resonances in an array of rare-earth ions controllably implanted into a solid-state lithium niobate micro-ring resonator. We show that cooperative effects can be observed in an ordered ion array extended far beyond the light’s wavelength. We observe enhanced emission from both cavity-induced Purcell enhancement and array-induced collective resonances at cryogenic temperatures. Engineering collective resonances as a paradigm for enhanced light-matter interactions can enable suppression of free-space spontaneous emission. The multi-functionality of lithium niobate hosting rare-earth ions can open possibilities of quantum photonic device engineering for scalable and multiplexed quantum networks.

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“…It must be admitted that our scheme appears quite naive in comparison with some recent studies of incoherent pumping [18,19]. On the other hand, we aim for less.…”

Section: Discussionmentioning

confidence: 95%

Long-Time Bit Storage and Retrieval without Cold Atom Technology

Friedberg

Manassah

2022

Symmetry

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We report computer studies showing how the duration of memory for storage and retrieval of a classical bit can be increased to 100 times the decay time of an isolated atom, with no use of high-tech cold-atom preparations recently developed in the light-matter field. We suggest that our low-tech procedure can greatly enlarge the number of experimenters able to enter this field. The role of symmetry in this procedure arises in a careful interplay of incoherent and coherent excitations of a large collection of “two-level” atoms, the level separation being matched by the dominant frequency of the electromagnetic fields (short pulses and continuing field) applied to the system.

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From superradiance to subradiance: exploring the many-body Dicke ladder

Cited by 11 publications

References 27 publications

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Collective excitation and decay of waveguide-coupled atoms: from timed Dicke states to inverted ensembles

Long-range cooperative resonances in rare-earth ion arrays inside photonic resonators

Long-Time Bit Storage and Retrieval without Cold Atom Technology

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