Characterization of barrier-tunable radio-frequency-SQUID for Maxwell’s demon experiment<xref rid="cpb_27_6_068501_fn1" ref-type="fn">*</xref> <fn id="cpb_27_6_068501_fn1"> <label>*</label> <p>Project supported by the National Natural Science Foundation of China (Grant No. 11653001), the National Basic Research Program of China (Grant No. 2011CBA00304), the Tsinghua University Initiative Scientific Research Program, China (Grant No. 20131089314), and the Zhejiang Tianjingsheng Foundation, China, for Student Assistantships (Gang Li and Hao Li).</p> </fn>

Characterization of barrier-tunable radio-frequency-SQUID for Maxwell’s demon experiment* *

Project supported by the National Natural Science Foundation of China (Grant No. 11653001), the National Basic Research Program of China (Grant No. 2011CBA00304), the Tsinghua University Initiative Scientific Research Program, China (Grant No. 20131089314), and the Zhejiang Tianjingsheng Foundation, China, for Student Assistantships (Gang Li and Hao Li).

Li Gang¹, Dhamala Suman², Li Hao¹, Liu JianShe¹, Chen Wei^{1, †}

(color online) Measured width (blue points) of the hysteresis loop as a function of ϕ_CJJ along with the theoretical curve (in red color) calculated from the qubit potential for L = 120 pH, I_c = 9.8 μA, and ΔU = 58.0 K. ϕ_CJJ is obtained through I_CJJ divided by period ΔI_CJJ = 2984 μA. Each point is obtained by averaging 200 repeats at the fixed values of I_bias and ϕ_sq. The inset shows the measurements of hysteresis loop at different values of ϕ_CJJ, here, ϕ_x of the symmetric point is adjusted to 0.5.