Superconducting quantum bits<xref rid="cpb_27_2_027401fn1" ref-type="fn">*</xref> <fn id="cpb_27_2_027401fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant Nos. 91321208 and 11674380) and the National Key Basic Research Program of the Ministry of Science and Technology of China (Grant Nos. 2014CB921202, 2015CB921104, and 2016YFA0300601).</p> </fn>

Superconducting quantum bits* *

Project supported by the National Natural Science Foundation of China (Grant Nos. 91321208 and 11674380) and the National Key Basic Research Program of the Ministry of Science and Technology of China (Grant Nos. 2014CB921202, 2015CB921104, and 2016YFA0300601).

Liu Wei-Yang^{1, 2}, Zheng Dong-Ning^{1, 2}, Zhao Shi-Ping^{1, 2, †}

(color online) Optical microscope image of an rf-SQUID-type phase qubit. The red open square and circles enclose the shadow evaporated junctions of the qubit and detector SQUID, respectively. The bar at the bottom-right corner indicates a length of 100 μm. (Figure reproduced with permission from Ref. [20]).