On the behaviour and stability of superconducting currents
On the behaviour and stability of superconducting currents
复制标题
关于超导电流的行为和稳定性
DOI:
10.1016/s0550-3213(02)01028-3
复制
发表时间:
2002
期刊:
影响因子:
--
通讯作者:
E. Shellard
中科院分区:
文献类型:
--
作者:
Y. Lempérière;E. Shellard
We present analytic and numerical results for the evolution of currents on superconducting strings in the classical U(1)×U(1) model. We derive an energy functional for the currents and charges on these strings, establishing rigorously that minima should exist in this model for loops of finite size (vortons) if both charge and current are present on the worldsheet. We then study the stability of the currents on these strings, and we find an analytic criterion for the onset of instability (in the neutral limit). This limit specifies a lower maximal current than previous heuristic estimates. We conclude with a discussion of the evolution of loops towards their final vorton state in the model under consideration.