RETURNING EFFECT AND THE FIRST ZERO FIELD STEP IN AN ANNULAR JOSEPHSON JUNCTION
环形Josephson结中的回波效应与第一零场台阶的下限偏置电流

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.