Spectral asymmetry of atoms in the van der Waals potential of an optical nanofiber

Patterson, Burkley D.; Solano, Pablo; Julienne, Paul S.; Orozco, L. A.; Rolston, Steven

doi:10.1103/physreva.97.032509

Cited by 8 publications

(8 citation statements)

References 34 publications

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“…Ideally, the peaks should appear at = 0 and δ (the detuning of the 780-nm cooling laser). The deviation of the peaks from the expected position and separation values may arise from many factors, such as a light shift, a van der Waal's shift due to the fiber surface [20,[35][36][37], or a shift due to stray electric charge on the fiber surface [14], experienced by the energy levels involved in the excitation process. These effects have not been incorporated in the model presented herein.…”

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confidence: 99%

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Generation of cold Rydberg atoms at submicron distances from an optical nanofiber

Rajasree

Ray

Karlsson

et al. 2020

Phys. Rev. Research

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We report on a controllable, hybrid quantum system consisting of cold Rydberg atoms and an optical nanofiber interface. Using a two-photon ladder-type excitation in 87 Rb, we demonstrate both coherent and incoherent Rydberg excitation at submicron distances from the nanofiber surface. The 780-nm photon, near resonant to the 5S → 5P transition, is mediated by the cooling laser, while the 482-nm light, near resonant to the 5P → 29D transition, is mediated by the guided mode of the nanofiber. The population loss rate of the cold atom ensemble is used to measure the Rydberg population rate. A theoretical model is developed to interpret the results and link the population loss rate to the experimentally measured, effective Rabi frequency of the process. This work makes headway in the study of Rydberg atom-surface interactions at submicron distances and the use of cold Rydberg atoms for all-fibered quantum networks.

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confidence: 99%

“…A systematic study related to the Rydberg atom formation and lifetime as a function of power in the blue beam is also desirable. The observed redshifts on the resonance frequencies are assumed to be dominated by van der Waals interactions between the atoms and the fiber surface [35][36][37].…”

mentioning

confidence: 99%

Generation of cold Rydberg atoms at submicron distances from an optical nanofiber

Rajasree

Ray

Karlsson

et al. 2020

Phys. Rev. Research

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“…The nanofiber is used to form a tapered region as a nanofiber waist, which connecting the two standard optical fibers with two fiber-Bragg-grating (FBG) mirrors, thereby forming an all-fiber cavity QED. The emitters are trapped in a stateinsensitive nanofiber trap [49,50], as illustrated in Fig. 1.…”

Section: The Model a The Effective Hamiltonian Of The Systemmentioning

confidence: 99%

High-order exceptional point in a nanofiber cavity quantum electrodynamics system

Li¹,

Li²,

Zhang³

2022

Preprint

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We present an all-fiber emitter-cavity quantum electrodynamics (QED) system which consists of two twolevel emitters and a nanofiber cavity. Our scheme makes it possible to observe the higher-order exceptional points based on the coupling between the emitters and the nanofiber cavity. The effective gain of this cavity can be obtained by weakly driven to the nanofiber cavity via two identical laser fields, which will realize coherent perfect absorption (CPA) in the implementation of the experiments. Under the experimental feasible parameters, the Hamiltonian of this system is in the condition of pseudo-Hermiticity, which means that its eigenvalues can be made of one real and a pair of complex conjugates, or be all real. By controllably tuned the ratio of the two emitter-cavity coupling strengths, and the ratio of the decay rates of the emitters, we can discover both the three-order exceptional point (EP3) and the second-order exceptional point (EP2) without parity-time symmetry in our emitter-cavity system. These results can also be demonstrated by the total output spectra and transmission spectra. We also find that the symmetric modes come into being when the coupling strength greater than the critical coupling strength at EP3 points. Our proposal will provide a new method to realize higher-order exceptional points based on the quantum network.

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“…This has been motivated by the great potential of hybrid atom-photon systems for sensing, quantum communication, and quantum information processing [2,[8][9][10]. Existing approaches tend to involve purpose-designed systems such as tapered nanofibers [11][12][13][14][15], hollow-core fibers [16][17][18][19][20], and other custom-built waveguide and photonic crystal structures [21,22], which do not lend themselves readily to integration. Herein we describe a universal technique capable of interfacing cold atoms with nearly any existing waveguide system.…”

Section: Introductionmentioning

confidence: 99%

Cold atoms in micromachined waveguides: A new platform for atom-photon interactions

Ros

Cooper

Nute

et al. 2020

Phys. Rev. Research

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Hybrid quantum devices, incorporating both atoms and photons, can exploit the benefits of both to enable scalable architectures for quantum computing and quantum communication, as well as chip-scale sensors and single-photon sources. Production of such devices depends on the development of an interface between their atomic and photonic components. This should be compact, robust, and compatible with existing technologies from both fields. Here we demonstrate such an interface. Cold cesium atoms are trapped inside a transverse, 30 μm-diameter through hole in an optical fiber, created via laser micromachining. When the guided light is on resonance with the cesium D 2 line, up to 87% of it is absorbed by the atoms. The corresponding optical depth per unit length is ∼700 cm −1 , higher than any reported for a comparable system. This is important for miniaturization and scalability. The technique can be equally effective in optical waveguide chips and other existing photonic systems, providing a promising platform for fundamental research.

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Spectral asymmetry of atoms in the van der Waals potential of an optical nanofiber

Cited by 8 publications

References 34 publications

Generation of cold Rydberg atoms at submicron distances from an optical nanofiber

Generation of cold Rydberg atoms at submicron distances from an optical nanofiber

High-order exceptional point in a nanofiber cavity quantum electrodynamics system

Cold atoms in micromachined waveguides: A new platform for atom-photon interactions

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