arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2606.09752hep-th
收藏

带有反常的二维QFT的双流形变

Double-Current Deformations of Two-Dimensional QFTs with Anomalies

Yau Mathematical Sciences Center, Tsinghua University(清华大学丘成桐数学科学中心);Department of Mathematical Sciences, Tsinghua University(清华大学数学科学系)

Zhengyuan Du

AI总结:

通过路径积分构造,将种子理论与动力学规范场和紧致Stueckelberg场耦合,并插入反常线丛中的平行输运,实现了保持反常的双流形变。

摘要:

我们构造了配分函数具有背景规范场反常的二维量子场论的双流形变。扩展[1]的路径积分构造,我们将种子理论与动力学规范场和紧致Stueckelberg场耦合,并插入反常线丛中的平行输运。形变后的配分函数具有与未形变时相同的反常。对于平坦背景规范场,Stueckelberg非零模将动力学规范场局域化为平坦联络,将形变简化为有限维和乐积分。我们推导了环面上的积分核及其高亏格推广。对于紧致玻色子,或等价地阿贝尔$U(1)$ WZW模型,该核给出了环面配分函数的高斯变换:在零背景时,谱由$k\to K_\lambda$得到,而接触项和谱流数据仍由原始反常控制。我们还提出了与反常兼容的非阿贝尔和齐次Yang-Baxter推广。

英文摘要:

We construct the double-current deformations of two-dimensional quantum field theories whose partition functions have background gauge-field anomalies. Extending the path integral construction of [1], we couple the seed theory to dynamical gauge fields and compact Stueckelberg fields and insert parallel transport in the anomaly line bundle. The deformed partition function then has the same anomaly as the undeformed one. For flat background gauge fields, the Stueckelberg non-zero modes localize the dynamical gauge fields to flat connections, reducing the deformation to a finite-dimensional holonomy integral. We derive the integral kernel on the torus and its higher-genus generalization. For the compact boson, or equivalently the Abelian $U(1)$ WZW model, the kernel gives a Gaussian transform of the torus partition function: at zero background the spectrum is obtained by $k\to K_λ$, while contact terms and spectral-flow data remain controlled by the original anomaly. As anomaly-free massive examples, we apply the kernel to massive complex bosons and massive Dirac fermions, for which the finite-volume spectra are obtained from the undeformed twisted spectra by charge-dependent shifts of the twists. We also formulate the anomaly-compatible non-Abelian and homogeneous Yang-Baxter generalization.

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。

↑