Persistent Supercurrent Atom Chip
Superconductivity
2009-11-13 v1 Other Condensed Matter
Quantum Physics
Abstract
Rubidium 87 atoms are trapped in an Ioffe-Pritchard potential generated with a persistent supercurrent that flows in a loop circuit patterned on a sapphire surface. The superconducting circuit is a closed loop made of 100 micro meter wide MBE-grown MgB2 stripe carrying a supercurrent of 2.5 A. To control the supercurrent in the stripe, an on-chip thermal switch operated by a focused argon-ion laser is developed. The switch operates as an on/off switch of the supercurrent, or as a device to set the current to a specific value with the aid of an external magnetic field. The current can be set even without an external source if the change is in decreasing direction.
Keywords
Cite
@article{arxiv.cond-mat/0702142,
title = {Persistent Supercurrent Atom Chip},
author = {T. Mukai and C. Hufnagel and A. Kasper and T. Meno and A. Tsukada and K. Semba and F. Shimizu},
journal= {arXiv preprint arXiv:cond-mat/0702142},
year = {2009}
}
Comments
4 pages, 5 figures