it's not a fundamental particle but a magnetic spin configuration due to certain nonlinear interaction (all solitions require nonlinear interactions). Solitions have been proposed and studied for decades but not very useful for practical proposes.
to be useful there are several issues to be addressed.
1.cost of making a device (it's very very very hard to beat current semi-conductor technology)
2.density of device on a chip ( it's very very hard to beat current semi-conductor technology)
3.speed of operation (it's very hard to beat current semi-conductor technology).
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