Hi there,
i have a question about boosting.
What is the difference between this type of boosting "boost": 2 explained here: Elastic Docu
and this type with circumflex: somefield^2
Regards,
Ahmet
Nothing 
The circumflex syntax is just how boosting is applied in query_string, multi_match and a few other queries, to allow "inline" boosting. It's required because query_string allows specifying multiple fields in the query string, and you may want to boost them independently.
Internally it's the same boost mechanics as a boost parameter.
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