Super-sensitive phase estimation with coherent boosted light using parity measurements<xref rid="cpb_27_1_014203_fn1" ref-type="fn">*</xref> <fn id="cpb_27_1_014203_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant No. 11665010), the Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, China (Grant No. QSQC1414), and the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 17B055).</p> </fn>

Super-sensitive phase estimation with coherent boosted light using parity measurements* *

Project supported by the National Natural Science Foundation of China (Grant No. 11665010), the Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, China (Grant No. QSQC1414), and the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 17B055).

Xu Lan^{1, 2, 3}, Tan Qing-Shou^{1, †}

(color online) (a) The parity signal 〈Π_a〉 and (b) the phase sensitivity Δϕ_d as a function of differential phase ϕ_d = φ_a − φ_b when r takes different values, where |α₀|² = |β₀|² = N_c/2 = 10.