Re: quantum of magnetic flux

["Bernard G. Cleyet & Nancy Ann Seese" <georgeann@REDSHIFT.COM>]

LP!

I'm lurking (semi) here.

According to CB the SQuI Device counts quanta of flux; would this not imply
that flux is quantized?  I can understand how it could be since it's
created by quanta (electrons moving, spinning,  and  revolving).

bc

P.s.   Wait a min.  Current is quantized, but flux also varies w/
distance.  If it's still quantized, then may be space is?

Leigh Palmer wrote:

> Magnetic flux is quantized if it is produced by a superconducting
> persistent current. By the same reasoning that leads to the quantization
> of angular momentum (or to the single-valuedness of wave functions in
> the azimuthal direction that David Bowman mentioned earlier) electron
> pairs (Cooper pairs) circulating in a superconducting ring can produce
> only discrete values of magnetic flux by Ampere's law. The flux quantum
> observed (in 1961 by Deaver and Fairbank at Stanford and also by Doll
> and Nabauer) demonstrated that the charge carrying entity in
> superconductors has a charge of 2e rather than e, supporting Cooper's
> mechanism which led to the BCS theory of superconductivity.
>
> In other circumstances magnetic flux need not be quantized. By Ampere's
> law it can be as continuously variable as the current which produces it.
>
> Leigh