تقرير
Eguchi-Hanson harmonic spinors revisited
| العنوان: | Eguchi-Hanson harmonic spinors revisited |
|---|---|
| المؤلفون: | Franchetti, Guido, Krasnov, Kirill |
| سنة النشر: | 2023 |
| المجموعة: | Mathematics High Energy Physics - Theory |
| مصطلحات موضوعية: | Mathematics - Differential Geometry, High Energy Physics - Theory |
| الوصف: | We revisit the problem of determining the zero modes of the Dirac operator on the Eguchi-Hanson space. It is well known that there are no normalisable zero modes, but such zero modes do appear when the Dirac operator is twisted by a $U(1)$ connection with $L^2$ normalisable curvature. The novelty of our treatment is that we use the formalism of spin-$c$ spinors (or spinors as differential forms), which makes the required calculations simpler. In particular, to compute the Dirac operator we never need to compute the spin connection. As a result, we are able to reproduce the known normalisable zero modes of the twisted Eguchi-Hanson Dirac operator by relatively simple computations. We also collect various different descriptions of the Eguchi-Hanson space, including its construction as a hyperk\"ahler quotient of $\mathbb{C}^4$ with the flat metric. The latter illustrates the geometric origin of the connection with $L^2$ curvature used to twist the Dirac operator. To illustrate the power of the formalism developed, we generalise the results to the case of Dirac zero modes on the Ricci-flat K\"ahler manifolds obtained by applying Calabi's construction to the canonical bundle of $\mathbb{C} P^n $. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2309.08453 |
| رقم الأكسشن: | edsarx.2309.08453 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |