Pre- and post-selected measurements with coupling-strength-dependent modulation<xref rid="cpb_28_3_030602fn1" ref-type="fn">*</xref><fn id="cpb_28_3_030602fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 11674234 and 11605205), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012017yjsy143), the National Key Research and Development Program of China (Grant No. 2017YFA0305200), the Youth Innovation Promotion Association of Chinese Academy of Sciences (CAS) (Grant No. 2015317), the Natural Science Foundation of Chongqing, China (Grant Nos. cstc2015jcyjA00021 and cstc2018jcyjAX0656), the Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees, China (Grant No. cx017134), the Fund of CAS Key Laboratory of Microscale Magnetic Resonance, China, and the Fund of CAS Key Laboratory of Quantum Information, China.</p></fn>

Pre- and post-selected measurements with coupling-strength-dependent modulation**

Project supported by the National Natural Science Foundation of China (Grant Nos. 11674234 and 11605205), the Fundamental Research Funds for the Central Universities, China (Grant No. 2012017yjsy143), the National Key Research and Development Program of China (Grant No. 2017YFA0305200), the Youth Innovation Promotion Association of Chinese Academy of Sciences (CAS) (Grant No. 2015317), the Natural Science Foundation of Chongqing, China (Grant Nos. cstc2015jcyjA00021 and cstc2018jcyjAX0656), the Entrepreneurship and Innovation Support Program for Chongqing Overseas Returnees, China (Grant No. cx017134), the Fund of CAS Key Laboratory of Microscale Magnetic Resonance, China, and the Fund of CAS Key Laboratory of Quantum Information, China.

Li Zhaoxue¹, Qiu Jiangdong¹, Xie Linguo¹, Luo Lan¹, Liu Xiong¹, Zhang Zhiyou^{1, 2, †}, Ren Changliang^{3, ‡}, Du JingLei^{1, 2}

Classical Fisher information as a function of the time delay τ in (a) standard PPSM scheme and (b) modulated PPSM scheme.