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Near-deterministic weak-value metrology via collective non-linearity
Journal
Quantum Science and Technology
Date Issued
2022-04-01
Author(s)
Vetrivelan, Muthumanimaran
Vinjanampathy, Sai
Abstract
Weak-value amplification employs postselection to enhance the measurement of small parameters of interest. The amplification comes at the expense of reduced success probability, hindering the utility of this technique as a tool for practical metrology. Following other quantum technologies that display a quantum advantage, we formalize a quantum advantage in the success probability and present a scheme based on non-linear collective Hamiltonians that shows a super-extensive growth in success probability while simultaneously displaying an extensive growth in the weak value. We propose an experimental implementation of our scheme.
Subjects