Optimal thickness of rectangular superconducting microtraps for cold atomic gases
arXiv:1208.2189 · doi:10.1103/PhysRevA.86.023412
Abstract
We study superconducting microtraps with rectangular shapes for cold atomic gases. We present a general argument why microtraps open, if brought close to the surface of the superconductor. We show that for a given width of the strips there exists an optimal thickness under which the closest distance of the microtrap from the superconductor can be achieved. The distance can be significantly improved, if the edge enhancement of the supercurrent near edges and corners is exploited. We compare numerical calculations with results from conformal mapping and show that conformal mapping can often give useful approximate results.
5 pages, 4 figures
References in corpus (17)
- Strong magnetic coupling of an ultracold gas to a superconducting waveguide cavity
- Thermally induced spin flips above an atom chip
- Realization of a superconducting atom chip
- Persistent Supercurrent Atom Chip
- Thermal spin flips in atom chips
- Meissner-London currents in superconductors with rectangular cross section
- Meissner effect in superconducting microtraps
- Bose-Einstein condensation on a superconducting atom chip
- Spin flip lifetimes in superconducting atom chips: BCS versus Eliashberg theory
- Superconducting atom chips: advantages and challenges
- Cold atoms near superconductors: Atomic spin coherence beyond the Johnson noise limit
- Nanowire atomchip traps for sub-micron atom-surface distances
- Reconfigurable self-sufficient traps for ultracold atoms based on a superconducting square
- Microtraps for neutral atoms using superconducting structures in the critical state
- Impact of the Meissner effect on magnetic micro traps for neutral atoms near superconducting thin films
- Magnetic confinement of neutral atoms based on patterned vortex distributions in superconducting disks and rings
- Heating rate and spin flip lifetime due to near field noise in layered superconducting atom chips
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- Dynamics of a dipolar Bose-Einstein condensate in the vicinity of a superconductor