Transporting long-lived quantum spin coherence in a photonic crystal fiber

Abstract

Confining particles in hollow-core photonic crystal fibers has opened up new prospects to scale up the distance and time over which particles can be made to interact with light. However, maintaining long-lived quantum spin coherence and/or transporting it over macroscopic distances in a waveguide remain challenging. Here, we demonstrate coherent guiding of ground-state superpositions of 85Rb atoms over a centimeter range and hundreds of milliseconds inside a hollow-core photonic crystal fiber. The decoherence is mainly due to dephasing from residual differential light shift (DLS) from the optical trap and the inhomogeneity of ambient magnetic field. Our experiment establishes an important step towards a versatile platform that can lead to applications in quantum information networks and matter wave circuit for quantum sensing.

arXiv commentAccepted by Physical Review Letters

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Cited by in corpus (12)

• Controlled transport of stored light
• Large array of Schrödinger cat states facilitated by an optical waveguide
• Balanced Coherence Times of Mixed-Species Atomic Qubits in a Dual $3\times 3$ Magic-Intensity Optical Dipole Trap Array
• Stopped and stationary light at the single-photon level inside a hollow-core fiber
• Long Light Storage Time in an Optical Fiber
• Enhancing fiber atom interferometer by in-fiber laser cooling
• Loading and spatially-resolved characterization of a cold atomic ensemble inside a hollow-core fiber
• Loading and Cooling in an Optical Trap via Hyperfine Dark States
• Dark-state sideband cooling in an atomic ensemble
• Stimulated Raman Scattering and Molecular Modulation in Anti-resonant Hollow-core Fibres
• Suppression of dark-state polariton collapses in cold-atom quantum memory
• Controlled Displacement of Stored Light at Room Temperature