We carried out the analysis of the return current of dc SQUID based on tunnel Josephson junction with unconventional current-phase relation. We analyzed two cases of current-phase relation with additional terms to the first harmonic sin φ: a case of the second harmonic sin 2φ and the case of the fractional term sin (φ/2). It is shown that the changing of the return current of dc SQUID on junctions with unconventional current-phase relation is determined by the amplitude of the second term in current-phase relation, geometrical inductance, and external magnetic field.

中文翻译：

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基于具有非常规电流-相位关系的隧道约瑟夫森结的直流 SQUID 返回电流

我们基于非常规电流-相位关系的隧道约瑟夫森结对dc SQUID的返回电流进行了分析。我们分析了电流-相位关系和一次谐波 sin φ 附加项的两种情况：二次谐波 sin 2φ 的情况和分数项 sin (φ/2) 的情况。结果表明，具有非常规电流-相位关系的结点上dc SQUID返回电流的变化是由电流-相位关系中第二项的幅值、几何电感和外部磁场决定的。