On the feasibility of studying vortex noise in 2D superconductors with cold atoms

Abstract

We investigate the feasibility of using ultracold neutral atoms trapped near a thin superconductor to study vortex noise close to the Kosterlitz-Thouless-Berezinskii transition temperature. Alkali atoms such as rubidium probe the magnetic field produced by the vortices. We show that the relaxation time $T_1$ of the Zeeman sublevel populations can be conveniently adjusted to provide long observation times. We also show that the transverse relaxation times $T_2$ for Zeeman coherences are ideal for studying the vortex noise. We briefly consider the motion of atom clouds held close to the surface as a method for monitoring the vortex motion.

4 pages, 1 figure

References in corpus (2)

• Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
• Condensate splitting in an asymmetric double well for atom chip based sensors

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