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 comparison of the optimal phase sensitivity gains between our scheme g_min and Caves’ scheme as a function of squeezing parameter r for various coherent photon numbers N_c. Note that in our scheme the values of OPSG are independent of N_c.