分裂四元数霍普夫映射、量子霍尔效应和扭量理论
Split-Quaternionic Hopf Map, Quantum Hall Effect, and Twistor Theory
摘要:
通过引入非紧形式的Hopf映射,我们证明了量子霍尔效应与扭量理论之间的密切联系。我们首先利用分裂四元数的非紧二阶Hopf映射在双曲面上构造了量子霍尔效应。我们分析了双曲单粒子力学,并探讨了多体问题,其中一个多体基态波函数和膜状激发显式导出。在最低朗道能级,对称性从$SO(3, 2)$增强到$SU(2, 2)$共形对称。指出量子霍尔效应自然地实现了扭量理论的哲学。特别是,模糊时空的出现机制进行了一定的详细讨论。
英文摘要:
Introducing a non-compact version of the Hopf map, we demonstrate remarkable close relations between quantum Hall effect and twistor theory. We first construct quantum Hall effect on a hyperboloid based on the noncompact 2nd Hopf map of split-quaternions. We analyze a hyperbolic one-particle mechanics, and explore many-body problem, where a many-body groundstate wavefunction and membrane-like excitations are derived explicitly. In the lowest Landau level, the symmetry is enhanced from $SO(3, 2)$ to the $SU(2, 2)$ conformal symmetry. We point out that the quantum Hall effect naturally realizes the philosophy of twistor theory. In particular, the emergence mechanism of fuzzy space-time is discussed somehow in detail.
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