Electric dipole moment of a BPS monopole
Electric dipole moment of a BPS monopole
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BPS 单极子的电偶极矩
DOI：
10.1103/physrevd.60.025002
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发表时间：
1998
影响因子：
5
通讯作者：
E. Na
中科院分区：
文献类型：
--
作者：
D. Kastor;E. Na
在玻色子$N=2 \ mathm {BPS}$单极子上，用有限的破缺超对称变换构造了单极子的“超伙伴”解。该结构中的一阶以上项表示费米子零模态在其他场上的反反应。由于费米子零模的量子性质，超伴解必然是算符值。我们提取了电偶极矩算子，并证明了它与费米子零模角动量算子成正比，且陀螺电比$g=2。磁性四极子操作符在所有状态上都相同地消失。我们评论了单极子超级伙伴解在BPS单极子的远程自旋依赖动力学研究中的有用性。
Monopole ``superpartner'' solutions are constructed by acting with finite, broken supersymmetry transformations on a bosonic $N=2 \mathrm{BPS}$ monopole. The terms beyond first order in this construction represent the back reaction of the fermionic zero-mode state on the other fields. Because of the quantum nature of the fermionic zero modes, the superpartner solution is necessarily operator valued. We extract the electric dipole moment operator and show that it is proportional to the fermion zero-mode angular momentum operator with a gyroelectric ratio $g=2.$ The magnetic quadrupole operator is shown to vanish identically on all states. We comment on the usefulness of the monopole superpartner solution for a study of the long-range spin-dependent dynamics of BPS monopoles.