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.

Accepted by Physical Review Letters

References in corpus (12)

• The Quantum Internet
• Atom Interferometers
• Hybrid photonic-crystal fiber
• Analysis of dephasing mechanisms in a standing wave dipole trap
• The Sagnac effect: 20 years of development in matter-wave interferometry
• Coherence properties and quantum state transportation in an optical conveyor belt
• Lamb-Dicke spectroscopy of atoms in a hollow-core photonic crystal fibre
• Trapping of Ultracold Atoms in a Hollow-core Photonic Crystal Fiber
• Experimental observation of magic-wavelength behavior in optical lattice-trapped ${}^{87}$Rb
• Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps
• Efficient Guiding of Cold Atoms though a Photonic Band Gap Fiber
• Rydberg excitation of cold atoms inside a hollow core fiber

Cited by in corpus (6)

• Long Light Storage Time in an Optical 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