Heating rate and spin flip lifetime due to near-field noise in layered superconducting atom chips.
Lim, M. J.
Date of Issue2010
School of Physical and Mathematical Sciences
We investigate theoretically the heating rate and spin flip lifetimes due to near-field noise for atoms trapped close to layered superconducting structures with the superconductor in the Meissner state. In particular, we compare the case of a gold layer deposited above a superconductor with the case of a bare superconductor. We study a niobium-based and a YBa2Cu3O7 − x (YBCO)-based chip. For both niobium and YBCO chips at a temperature of 4.2 K, we find that the deposition of the gold layer can have a significant impact on the heating rate and spin flip lifetime, as a result of the increase of the near-field noise. At a chip temperature of 77 K, this effect is less pronounced for the YBCO chip.
Journal of physics B: atomic, molecular and optical physics
© 2010 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Journal of Physics B: Atomic, Molecular and Optical Physics, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI:http://dx.doi.org/10.1088/0953-4075/43/9/095002].