Superradiance and subradiance in inverted atomic arrays

Rubies-Bigordà, Oriol; Yelin, Susanne F.

doi:10.48550/arxiv.2110.11288

Cited by 4 publications

(4 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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]. Recently, nanofiber-based atom-light interfaces have opened a new experimental avenue for studying collective radiative dynamics with waveguide-coupled atoms [26][27][28][29][30][31][32][33].…”

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

View full text Add to dashboard Cite

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Finally, we note that our method is limited to identifying the minimal conditions for the presence of a burst, but not the properties of the burst. Information about, for example, the scaling of the peak emission requires a different approach [53,54]. We also consider only the total photon emission (i.e., integrating the radiation over all directions).…”

mentioning

confidence: 99%

Dicke superradiance in ordered lattices: dimensionality matters

Sierra,

Masson,

Asenjo-Garcia

2021

Preprint

View full text Add to dashboard Cite

Many-body superradiance in ordered atomic arrays is a phenomenon where atomic synchronization gives rise to a burst in photon emission. This superradiant burst only occurs if there is one -or just a few -dominant decay channels. By mapping the question of whether many-body superradiance occurs into a simple algebraic equation, we demonstrate that it exists in arrays of any dimensionality, as interference in photon emission leads to the preeminence of certain channels over others. In atomic chains superradiance occurs only below a critical interatomic distance, which we derive analytically. Increasing the array dimensionality leads to a critical distance that scales with system size: sublogarithmically for 2D, and seemingly faster than that for 3D lattices. We perform calculations for both infinite and finite systems, the latter by employing a highly-efficient algorithm with a computational complexity that scales only linearly with system size, which enables us to study very large arrays. Our results provide a guide to explore this many-body phenomenon in state-of-the art experimental setups.

show abstract

“…Using these two approaches, seminal experiments have been carried out in the last decades, enabled by an ever-increasing level of control of the system parameters [4][5][6][7][8][9]. The situation is more complex for extended ensembles in free space, since the synchronization via the shared optical mode competes with decay into independent modes [10][11][12][13][14][15][16][17]. It then turns out that superradiant burst dynamics disappears when the atoms are separated in free space by more than an optical wavelength [12].…”

Section: Introductionmentioning

confidence: 99%

Observation of superradiant bursts in waveguide QED

Liedl¹,

Tebbenjohanns²,

Bach³

et al. 2022

Preprint

View full text Add to dashboard Cite

Dicke superradiance describes the collective decay dynamics of a fully inverted ensemble of twolevel atoms. There, the atoms emit light in the form of a short, intense burst due to a spontaneous synchronization of the atomic dipoles. Typically, to observe this phenomenon, the atoms must be placed in close vicinity of each other. In contrast, here we experimentally observe superradiant burst dynamics with a one-dimensional ensemble of atoms that extends over thousands of optical wavelengths. This is enabled by coupling the atoms to a nanophotonic waveguide, which mediates long-range dipole-dipole interactions between the emitters. The burst occurs above a threshold atom number, and its peak power scales faster with the number of atoms than in the case of standard Dicke superradiance. Moreover, we study the coherence properties of the burst and observe a sharp transition between two regimes: in the first, the phase coherence between the atoms is seeded by the excitation laser. In the second, it is seeded by vacuum fluctuations. Our results shed light on the collective radiative dynamics of spatially extended ensembles of quantum emitters and may turn out useful for generating multi-photon Fock states as a resource for quantum technologies.

show abstract

Superradiance and subradiance in inverted atomic arrays

Cited by 4 publications

References 55 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

Dicke superradiance in ordered lattices: dimensionality matters

Observation of superradiant bursts in waveguide QED

Contact Info

Product

Resources

About