Atom chips in the real world: the effects of wire corrugation

Abstract

We present a detailed model describing the effects of wire corrugation on the trapping potential experienced by a cloud of atoms above a current carrying micro wire. We calculate the distortion of the current distribution due to corrugation and then derive the corresponding roughness in the magnetic field above the wire. Scaling laws are derived for the roughness as a function of height above a ribbon shaped wire. We also present experimental data on micro wire traps using cold atoms which complement some previously published measurements and which demonstrate that wire corrugation can satisfactorily explain our observations of atom cloud fragmentation above electroplated gold wires. Finally, we present measurements of the corrugation of new wires fabricated by electron beam lithography and evaporation of gold. These wires appear to be substantially smoother than electroplated wires.

References in corpus (5)

• Impact of the Casimir-Polder Potential and Johnson Noise on Bose-Einstein Condensate Stability near Surfaces
• The role of wire imperfections in micro magnetic traps for atoms
• Atom Chips: Fabrication and Thermal Properties
• Cold atoms probe the magnetic field near a wire
• Foil-based atom chip for Bose-Einstein condensates

Cited by in corpus (35)

• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Fifteen Years of Cold Matter on the Atom Chip: Promise, Realizations, and Prospects
• Localization of Matter Waves in 2D-Disordered Optical Potentials
• Long-Range Order in Electronic Transport through Disordered Metal Films
• Disordered ultracold atomic gases in optical lattices: A case study of Fermi-Bose mixtures
• Disorder Potentials near Lithographically Fabricated Atom Chips
• Optically guided linear Mach Zehnder atom interferometer
• Box traps on an atom chip for one-dimensional quantum gases
• Anderson localization of a weakly interacting one dimensional Bose gas
• Atom chip for BEC interferometry
• Realizing a stable magnetic double-well potential on an atom chip
• Order via Nonlinearity in Randomly Confined Bose Gases
• Atom chips with two-dimensional electron gases: theory of near surface trapping and ultracold-atom microscopy of quantum electronic systems
• Towards a guided atom interferometer based on a superconducting atom chip
• Organized Current Patterns in Disordered Conductors
• Limitation of the modulation method to smooth wire guide roughness
• Designing potentials by sculpturing wires
• Hartree-Fock Mean-Field Theory for Trapped Dirty Bosons
• Diffuse reflection of a Bose-Einstein condensate from a rough evanescent wave mirror
• Analytical and numerical study of dirty bosons in a quasi-one-dimensional harmonic trap
• Disorder-Induced Shift of Condensation Temperature for Dilute Trapped Bose Gases
• Magnetic interactions of cold atoms with anisotropic conductors
• Experiments on a videotape atom chip: fragmentation and transport studies
• Using graphene conductors to enhance the functionality of atom-chips
• Inductive dressed ring traps for ultracold atoms
• Green's function approach to the Bose-Hubbard model with disorder
• On the Hydrodynamic Boundary Condition for Superfluid Flow
• The effect of self-affine fractal roughness of wires on atom chips
• A Bose-Einstein condensate bouncing off a rough mirror
• Transverse excitations of ultracold matter waves upon propagation past abrupt waveguide changes
• On the information entropy of matter-waves in quasi-disorder potentials
• Nonlinear Transport of Bose-Einstein Condensates Through Waveguides with Disorder
• Atom chips with free-standing two-dimensional electron gases: advantages and challenges
• Quantum gas-enabled direct mapping of active current density in percolating networks of nanowires
• Roughness with a finite correlation length in the Microtrap