Other
Spin bath-mediated decoherence in superconductors
Physics Department Faculty Publication Series
Publication Date
2000
Abstract
We consider a SQUID tunneling between 2 nearly degenerate flux states. Decoherence caused by paramagnetic and nuclear spins in the low-T limit is shown to be much stronger than that from electronic excitations. The decoherence time ô is determined by the linewidth Eo of spin bath states, which can be reduced by a correct choice of ring geometry and isotopic purification. Eo can be measured in either field sweep or microwave absorption experiments, allowing both a test of the theory and design control.
Disciplines
Comments
This is the pre-published version harvested from ArXiv.
Citation Information
Nikolai Prokof'ev and P.C.E Stamp. "Spin bath-mediated decoherence in superconductors" (2000) Available at: http://works.bepress.com/nikolai_prokofev/4/