Photon addition and subtraction enhance QFI for nonlinear parameter estimation on squeezed vacuum states but not on coherent states, where the benefit reduces to extra energy, allowing comparable performance with lower squeezing.
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Squeezing as a catalyst for non-Gaussian advantage in characterization of nonlinear media
Photon addition and subtraction enhance QFI for nonlinear parameter estimation on squeezed vacuum states but not on coherent states, where the benefit reduces to extra energy, allowing comparable performance with lower squeezing.