HIGHLIGHTS
- who: David R. M. Arvidsson-Shukur from the Cavendish LaboratoryUniversity of e of Technology, Cambridge, MA, USA have published the research work: Quantum advantage in postselected metrology, in the Journal: NATURE COMMUNICATIONS NATURE COMMUNICATIONS
- what: The authors show that, within a commuting theory, a theory in which observables commute classically, postselection can improve information-cost rates no more than a strategy that uses 2 1-p p Γ F ps an optimal input and final measurement can. Below, the authors show how postselection affects the Fisher information in a quantum setting.
- future: The counterfactual . . .
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