We present a systematic numerical study of the coupled one-dimensional sine-Gordon equations for a stack of 20 Josephson junctions, with junction parameters that are representative for intrinsic Josephson junctions in Bi₂SrCa₂Cu₂O₈. Simulations were performed for zero external magnetic field. We found a large variety of fluxon and antifluxon modes, often involving the excitation of collective Josephson plasma oscillations or cavity resonances. Representative states are discussed in detail.
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Kleiner et al. (2000) studied this question.
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