Photon-added GHZ-type coherent states are claimed to lower multiparameter phase-estimation errors under simultaneous and nonlinear estimation compared with NOON and entangled-coherent states, in the paper's analytical models.
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Multiple phase estimation with photon-added multi-mode coherent states of GHZ-type
Photon-added GHZ-type coherent states are claimed to lower multiparameter phase-estimation errors under simultaneous and nonlinear estimation compared with NOON and entangled-coherent states, in the paper's analytical models.