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本文用微扰理论下环形Josephson结中圆对称孤子点粒子模型所得的结果,首先分析了环形结中各种耗散情形下的孤子回波效应,部分结果与数值模拟计算结果进行了比较;然后讨论了孤子为避免回波效应而共振地在结中往返传播,环形结必须具备的最小偏置电流,分析表明,这种最小偏置电流与结的内、外半径和结中的耗散情形有关,给出了一些理论计算结果,并对此进行了讨论。The returning effect of soliton in an annular Josephson junction is analysed in detail theoretically. Some results are compared with directly numerical simulation ones. To avoid the return effect of soliton, the conditions which relate to the minimum bias current of the first zero step of annular junctions with different geometric and dissipative parameters are discussed. A disscusion of the difference between in-line and annular junction is also made.
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