Optical wire trap for cold neutral atoms

Abstract

We propose a trap for cold neutral atoms using a fictitious magnetic field induced by a nanofiber-guided light field. In close analogy to magnetic side-guide wire traps realized with current-carrying wires, a trapping potential can be formed when applying a homogeneous magnetic bias field perpendicular to the fiber axis. We discuss this scheme in detail for laser-cooled cesium atoms and find trap depths and trap frequencies comparable to the two-color nanofiber-based trapping scheme but with one order of magnitude lower powers of the trapping laser field. Moreover, the proposed scheme allows one to bring the atoms closer to the nanofiber surface, thereby enabling efficient optical interfacing of the atoms with additional light fields. Specifically, optical depths per atom, ${\sigma }_0/A_{\mathrm{eff}}$, of more than 0.4 are predicted, making this system eligible for nanofiber-based nonlinear and quantum optics experiments.

References in corpus (7)

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• Self-calibrating vector atomic magnetometry through microwave polarization reconstruction
• Spatially-resolved control of fictitious magnetic fields in a cold atomic ensemble
• Self-organization of atoms coupled to a chiral reservoir
• Measuring the polarization of electromagnetic fields using Rabi-rate measurements with spatial resolution: experiment and theory
• Optical trap for an atom around the midpoint between two coupled identical parallel optical nanofibers
• Using graphene conductors to enhance the functionality of atom-chips
• Vector polarizability of atomic state induced by a linearly polarized vortex beam: External control of magic, tune-out wavelengths, and heteronuclear spin oscillations
• Measurement of the 87Rb D-line vector tune-out wavelength
• Light-induced, fictitious magnetic trapping of cold alkali atoms using an optical tweezers-nanofiber hybrid platform