Persistent Supercurrent Atom Chip

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 co...

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Bibliographic Details
Published inarXiv.org
Main Authors Mukai, T, Hufnagel, C, Kasper, A, Meno, T, Tsukada, A, Semba, K, Shimizu, F
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.02.2007
Subjects
Argon
Closed loops
Magnesium compounds
Rubidium
Sapphire
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0702142