Heisenberg-Scaling Measurement Protocol for Analytic Functions with Quantum Sensor Networks
arXiv:1901.09042 · doi:10.1103/PhysRevA.100.042304
Abstract
We generalize past work on quantum sensor networks to show that, for input parameters, entanglement can yield a factor improvement in mean squared error when estimating an analytic function of these parameters. We show that the protocol is optimal for qubit sensors, and conjecture an optimal protocol for photons passing through interferometers. Our protocol is also applicable to continuous variable measurements, such as one quadrature of a field operator. We outline a few potential applications, including calibration of laser operations in trapped ion quantum computing.
arXiv comment10 pages, 2 figures, v2: updated to published version
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