Collective dipole-dipole interactions in planar nanocavities

Dobbertin, Helge; Löw, Robert; Scheel, Stefan

doi:10.1103/physreva.102.031701

Cited by 4 publications

(6 citation statements)

References 36 publications

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“…Dipole-dipole interactions are observable in steady-state experiments performed in thin alkali vapor cells [6][7][8], where the cells are heated to temperatures above 300 °C. Dipolar broadening effects were previously observed to be independent of the system geometry, while the line shift depends on the dimensionality of the system, as investigated in a 2D model [8,9]. It is however not straightforward to prepare high densities with alkali vapors [10].…”

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confidence: 99%

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

et al. 2022

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confidence: 99%

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

et al. 2022

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“…where H ij (R C , R D ) are the Green's function-dependent coefficients for two atoms located at R C,D for jith transition, as detailed in [44].…”

Section: Quantum Master Equation For the Reduced Atomic Density Matrixmentioning

confidence: 99%

“…a resonant photon that swaps the spins of the two atoms. In the last line ω CP , Γ corresponds to the collective phase shift and dissipation due to the other off-resonant electronic states of the atom [44]. Such a shift was first studied by Casimir and Polder and hence it is preferred to as Casimir-Polder (CP) shift [16], whose detailed form can be found in appendix.…”

Section: The Coupled-spin Master Equation and Classical Coupled-dipol...mentioning

confidence: 99%

“…In a discrete medium of closely spaced individual atoms, superradiance results in a dispersive effective interaction, sometimes referred to as the cooperative Lamb shift [25], observed in thin atomic layers [26][27][28]. Various theoretical approaches have been proposed [29][30][31][32][33] to explain some but not all observed features. In systems with numerous interacting atoms in a disordered ensemble, the resulting inhomogeneous broadening of atomic resonance frequencies leads to saturation of the optical response, resulting in an effective refractive index of the atomic medium that reaches approximately n ≈ 1.7 [34].…”

Section: Introductionmentioning

confidence: 99%

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Manipulating the dipolar interactions and cooperative effects in confined geometries

Alaeian,

Skljarow,

Scheel

et al. 2024

New J. Phys.

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To facilitate the transition of quantum effects from the controlled laboratory environment to practical real-world applications, there is a pressing need for scalable platforms. One promising strategy involves integrating thermal vapors with nanostructures designed to manipulate atomic interactions. In this tutorial, we aim to gain deeper insights into this by examining the behavior of thermal vapors thatare confined within nanocavities or waveguides and exposed to near-resonant light. We explore the interactions between atoms in confined dense thermal vapors. Our investigation reveals deviations from the predictions of continuous electrodynamics models, including density-dependent line shifts and broadening effects. In particular, our results demonstrate that by carefully controlling the saturation of single atoms and the interactions among multiple atoms using nanostructures, along with controlling the geometry of the atomic cloud, it becomes possible to manipulate the effective optical nonlinearity of the entire atomic ensemble. This capability renders the hybrid thermal atom-nanophotonic platform a distinctive and valuable one for manipulating the collective effect and achieving substantial optical nonlinearities.

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“…Dipole-dipole interactions are observable in steady-state experiments performed in thin vapor cells [6][7][8], where the cells are heated to temperatures above 300 °C. Dipolar broadening effects were previously observed to be independent of the system geometry, while the line shift depends on the dimensionality of the system, as investigated in a 2D model [8,9]. It is however not straightforward to prepare high densities with alkali vapors [10].…”

mentioning

confidence: 99%

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

Christaller,

Mäusezahl,

Moumtsilis

et al. 2021

Preprint

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We exploit the effect of light-induced atomic desorption (LIAD) to produce high atomic densities (n k 3 ) in a rubidium vapor cell. An intense off-resonant laser is pulsed for roughly one nanosecond on a micrometer-sized sapphire-coated cell, which results in the desorption of atomic clouds from both internal surfaces. We probe the transient (LIAD-induced) atomic density by time-resolved absorption spectroscopy. With a temporal resolution of ≈ 1 ns, we measure the broadening and line shift of the atomic resonances. This broadening and line shift is attributed to dipole-dipole interactions. As this timescale is much faster than the natural atomic lifetime, the experiment probes the dipolar interaction in a non-equilibrium situation beyond the usual steady-state, assumed in the derivation of the Lorentz-Lorenz shift. This fast switching of the atomic density and dipolar interactions could be the basis for future quantum devices based on the excitation blockade.

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Collective dipole-dipole interactions in planar nanocavities

Cited by 4 publications

References 36 publications

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

Manipulating the dipolar interactions and cooperative effects in confined geometries

Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

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