Quantum metrology with a non-Markovian qubit system<xref rid="cpb_27_12_120301fn1" ref-type="fn">*</xref><fn id="cpb_27_12_120301fn1"><label>*</label><p>Projects supported by the Natural Science Foundation of Guangdong Province, China (Grant No. 2015A030310354), the Science Foundation for Enhancing School with Innovation of Guangdong Ocean University (Grant Nos. GDOU2017052504 and GDOU2015050207), the Foundation of Excellent-Young-Backbone Teacher of Guangdong Ocean University (Grant No. HDYQ2017005), and the Fund of University Student Innovation and Entrepreneurship Team of Guangdong Ocean University (Grant No. CCTD201823).</p></fn>

Quantum metrology with a non-Markovian qubit system**

Projects supported by the Natural Science Foundation of Guangdong Province, China (Grant No. 2015A030310354), the Science Foundation for Enhancing School with Innovation of Guangdong Ocean University (Grant Nos. GDOU2017052504 and GDOU2015050207), the Foundation of Excellent-Young-Backbone Teacher of Guangdong Ocean University (Grant No. HDYQ2017005), and the Fund of University Student Innovation and Entrepreneurship Team of Guangdong Ocean University (Grant No. CCTD201823).

Huang Jiang, Shi Wen-Qing^†, Xie Yu-Ping, Xu Guo-Bao^‡, Wu Hui-Xian

(color online) QFI is plotted against the dimensionless quantities g0t for the optimal output state in the photonic band gap model.