Figure 1
From: Projective measurement onto arbitrary superposition of weak coherent state bases
(a) Simple schematic of our measurement scheme. \({\hat{\rho }}^{|{C}_{\pm }\rangle }\) indicates the state that can be described in the two-dimensional space |C±〉. (b) Fidelity as a function of the superposition coefficient \({c}_{0}^{2}\) with fixed coherent amplitude α = 0.50 and phase ϕ = 0. Dotted line, solid line and dashed line denote the displaced-photon counting, the homodyne measurement and the PNRD respectively. (c) Corresponding optimal displacement amplitude as a function of the superposition coefficient \({c}_{0}^{2}\). (d) Fidelity as a function of the superposition coefficient \({c}_{0}^{2}\) and the mean photon number α2. The relative phase of the coefficients is set to ϕ = 0.
