Lieb-Mattis states enable efficient preparation of entangled states for robust differential phase sensing with Heisenberg scaling or square-root improvement in two-node networks via cavity-mediated protocols.
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Develops reference-frame-independent nonlinear quantum metrology using local unitary invariants and randomized local measurements on multiple copies, deriving analytical precision scaling for two-body interaction Hamiltonians like one-axis twisting.
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Lieb-Mattis states for robust entangled differential phase sensing
Lieb-Mattis states enable efficient preparation of entangled states for robust differential phase sensing with Heisenberg scaling or square-root improvement in two-node networks via cavity-mediated protocols.