π-Corrected Heisenberg Limit.
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DOI: 10.1103/physrevlett.124.030501
Abstract: We consider the precision Δφ with which the parameter φ, appearing in the unitary map U_{φ}=e^{iφΛ}, acting on some type of probe system, can be estimated when there is a finite amount of prior information… read more here.
Keywords: heisenberg limit; corrected heisenberg; limit;