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Hybrid Trapping of Cold Atoms with Surface Forces and Blue-Detuned Evanescent Light on a Nanophotonic Waveguide

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arxiv 2509.17767 v1 pith:IJQEVPWY submitted 2025-09-22 quant-ph physics.atom-phphysics.optics

Hybrid Trapping of Cold Atoms with Surface Forces and Blue-Detuned Evanescent Light on a Nanophotonic Waveguide

Riccardo Pennetta , Antoine Glicenstein , Philipp Schneeweiss , J\"urgen Volz , Arno Rauschenbeutel This is my paper
classification quant-ph physics.atom-phphysics.optics
keywords atomsnanophotonicsurfacetrapforceshybridblue-detunedcoherence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We demonstrate a novel hybrid nanophotonic trap for cold neutral atoms, leveraging surface forces for attraction and blue-detuned evanescent light for repulsion. We attribute the attractive potential to a combination of Casimir-Polder interactions and electrostatic charges distributed on the waveguide surface. Despite the trap's shallow depth, we efficiently load atoms into it via adiabatic transfer from a conventional two-color dipole trap. Remarkably, the hybrid trap supports a long atomic storage time of 140(9) ms and exhibits a Ramsey coherence time of 16.8(2) ms, the latter exceeding significantly previous reports for nanophotonic systems. Our results pave the way for further exploration of atom-surface interactions at the nanoscale and illustrate the potential of harnessing surface forces to enhance storage and coherence times for atoms coupled to nanophotonic waveguides. This advancement offers new opportunities for neutral-atom quantum technologies.

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Cited by 4 Pith papers

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    quant-ph 2025-12 conditional novelty 7.0

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  4. Surface charges in a Rydberg atom-nanowaveguide hybrid quantum system

    physics.atom-ph 2026-07 unverdicted novelty 5.0

    Surface charges on the nanofiber, generated via Rydberg-ground state collisional ionization enhanced by dipole trapping fields, produce time-evolving spectral features in Rydberg excitation that are suppressed by an e...