arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2008.11536cond-mat.str-el
收藏

磁通量晶格中拓扑路径熔合产生的分数带电任意子

Fractionally charged anyon generated by topological path fusion in magnetic flux lattice

Tieyan Si

摘要:

任意子通常以强磁场作用下二维电子气的集体激发形式存在,携带分数电荷,具有费米子和玻色子以外的奇异统计特性。分数量子霍尔效应是迄今为止唯一显示出任意子和分数电荷存在的实验系统。在量子化学或其他物理系统中寻找新的分数电荷序列仍然是理论和实验研究的一个挑战。本文提出了一个围绕一对磁通量的传播路径的拓扑融合理论,以探讨分数电荷的物理起源。该拓扑路径融合理论不仅产生了量子霍尔效应中所有存在的分数电荷序列,找到了量子霍尔效应与积分量子霍尔效应(IQHE)的精确对应,而且预言了量子霍尔效应中新的分数电荷序列.此外,还预测了一维磁通量点阵中的系列无理电荷如$2/(3+\sqrt{2})$,以及二维磁通量点阵中的系列无理电荷如$(1+\sqrt{2})$.即使在三维的磁通量网络中,该拓扑路径融合理论也预言了一系列分数带电的任意子,这与任意子的纽结晶格模型完全对应。事实上,在没有磁场的多连通时空中,这一拓扑路径融合理论依然成立,揭示了粒子强约束量子材料(如具有多孔纳米结构的光子晶体)中分数电荷和质量的普遍存在,为拓扑量子计算开辟了新的道路。

英文摘要:

Anyon usually exists as collective excitation of two dimensional electron gas subjected to strong magnetic field, carrying fractional charges and exotic statistical character beyond fermion and boson. Fractional quantum Hall effect (FQHE) is the only experimental system showing solid evidence of anyon and a serial of fractional charges so far. Searching for new serial of fractional charges in FQHE or other physical system is still a challenge for both theoretical and experimental study. Here a topological fusion theory of propagating paths winding around a pair of fluxes is proposed to explore the physical origin of fractional charges. This topological path fusion theory not only generated all of the existed serial of fractional charges in FQHE and found the exact correspondence between FQHE and integral quantum Hall effect (IQHE), but also predicted new serial of fractional charges in FQHE. Further more, serial irrational charges like $2/(3+\sqrt{2})$ in one dimensional lattice of magnetic fluxes as well as that in two dimensional lattice of magnetic fluxes, such as $(1+\sqrt{2})$, are predicted. Even in three dimensional network of magnetic fluxes, a serial of fractionally charged anyon is predicted by this topological path fusion theory, which has exactly correspondence with the knot lattice model of anyon. In fact, in a multi-connected space time without magnetic field, this topological path fusion theory still holds, revealing an universal existence of fractional charge and mass in quantum material with strong confinement of particles (such as photonic crystal with porous nano-structures) and paving a new way for topological quantum computation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑