Heisenberg scaling with classical long-range correlations
arXiv:1708.09361 · doi:10.1103/PhysRevA.97.023843
Abstract
The Heisenberg scaling is typically associated with nonclassicality and entanglement. In this work, however, we discuss how classical long-range correlations between lattice sites in many-body systems may lead to a 1/N scaling in precision with the number of probes. In particular, we show that networks of coupled single qubit lasers can be mapped onto a classical XY model, and a Heisenberg scaling with the number of sites appears when estimating the amplitude and phase of a weak periodic driving field.
11 pages, 2 figures. Comments are welcome
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- Quantum-enhanced atomic gyroscope with tunable precision
- Quantum sensing with ultracold simulators in lattice and ensemble systems: a review
- From dynamical to steady-state many-body metrology: Precision limits and their attainability with two-body interactions