For suitable spatial and temporal correlations in non-Markovian dephasing, entangled probes achieve superior sensitivity scaling with probe number compared to separable states in Ramsey spectroscopy.
Acernese, et al., and Virgo Collaboration, Increasing the astrophysical reach of the advanced virgo detector via the application of squeezed vacuum states of light, Phys
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Entanglement Enhanced Sensing with Qubits affected by non-Markovian Dephasing
For suitable spatial and temporal correlations in non-Markovian dephasing, entangled probes achieve superior sensitivity scaling with probe number compared to separable states in Ramsey spectroscopy.