2009/12/11 by Rachele Fermani, R Fermani, T Müller +7 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #physics.atom-ph #quant-ph
paper · pdf · doi:10.1088/0953-4075/43/9/095002
published as J. Phys. B: At. Mol. Opt. Phys. 43 (2010) 095002 · 7 pages, 7 figures
arxiv created 2009/12/11 · openalex publication_date 2010/04/12 · arxiv updated 2010/04/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
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 YBa 2 Cu 3 O 7 − 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.