Optimal finite-dimensional probe states for quantum phase estimation under particle loss are found via constrained optimization, and a two-step measurement strategy achieves the ultimate precision limit as confirmed by numerical simulations.
Jarzynaand R.Demkowicz-Dobrzański, MatrixProd- uct States for Quantum Metrology, Phys
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Optimal noisy quantum phase estimation with finite-dimensional states
Optimal finite-dimensional probe states for quantum phase estimation under particle loss are found via constrained optimization, and a two-step measurement strategy achieves the ultimate precision limit as confirmed by numerical simulations.