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) (a) DC-SQUID V_out under different values of I_sq and I_bias. (b) I_sw(ϕ_sq) curve of the DC-SQUID. Here, ϕ_sq is obtained through I_sq divided by period ΔI_sq = 2968 μA. I_sw is normalized to the critical current of DC-SQUID 2I₀ = 37.0 μA. (c) I–V curves of DC-SQUID under flux modulation of ϕ_sq. (d) I–V curves of DC-SQUID at ϕ_sq = 0.157 and ϕ_sq = 0.566.