Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre

Abstract

Unlike photons, which are conveniently handled by mirrors and optical fibres without loss of coherence, atoms lose their coherence via atom-atom and atom-wall interactions. This decoherence of atoms deteriorates the performance of atomic clocks and magnetometers, and also hinders their miniaturisation. Here we report a novel platform for precision spectroscopy. Ultracold strontium atoms inside a kKagome-lattice hollow-core photonic crystal fibre (HC-PCF) are transversely confined by an optical lattice to prevent atoms from interacting with the fibre wall. By confining at most one atom in each lattice site, to avoid atom-atom interactions and Doppler effect, a 7.8-kHz-wide spectrum is observed for the ${}^1{S}_0-{}^3{P}_1$ (m=0) transition. Atoms singly trapped in a magic lattice in hollow-core photonic crystal fibresHC-PCFs improve the optical depth while preserving atomic coherence time.

31 pages, 8 figures

References in corpus (5)

• The Quantum Internet
• Strong interaction between light and a single trapped atom without a cavity
• Trapping of Ultracold Atoms in a Hollow-core Photonic Crystal Fiber
• Efficient Guiding of Cold Atoms though a Photonic Band Gap Fiber
• Spontaneous radiative decay of translational levels of an atom near a dielectric surface

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• Optically guided atom interferometer tuned to magic wavelength
• Cavity polaritons with Rydberg blockade and long-range interactions
• Infiltrating a thin or single layer opal with an atomic vapour: sub-doppler signals and crystal optics
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