Fundamental limits of metrology at thermal equilibrium

P Abiuso, P Sekatski, J Calsamiglia… - Physical Review Letters, 2025 - APS
We consider the estimation of an unknown parameter θ through a quantum probe at thermal
equilibrium. The probe is assumed to be in a Gibbs state according to its Hamiltonian H θ …

From dynamical to steady-state many-body metrology: Precision limits and their attainability with two-body interactions

R Puig, P Sekatski, PA Erdman, P Abiuso… - arxiv preprint arxiv …, 2024 - arxiv.org
We consider the estimation of an unknown parameter $\theta $ via a many-body probe. The
probe is initially prepared in a product state and many-body interactions enhance its $\theta …

Overcoming sloppiness for enhanced metrology in continuous-variable quantum statistical models

M Frigerio, MGA Paris - arxiv preprint arxiv:2410.02989, 2024 - arxiv.org
Multi-parameter statistical models may depend only on some functions of the parameters
that are fewer than the number of initial parameters themselves. Such\emph {sloppy} …

Heisenberg-limited spin-mechanical gravimetry

V Montenegro - Physical Review Research, 2025 - APS
Precision measurements of gravitational acceleration, or gravimetry, enable the testing of
physical theories and find numerous applications in geodesy and space exploration. By …