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Global structures from the infrared (2023)
Journal Article
Del Zotto, M., & García Etxebarria, I. (2023). Global structures from the infrared. Journal of High Energy Physics, 2023(11), Article 58. https://doi.org/10.1007/jhep11%282023%29058

Quantum field theories with identical local dynamics can admit different choices of global structure, leading to different partition functions and spectra of extended operators. Such choices can be reformulated in terms of a topological field theory... Read More about Global structures from the infrared.

A Goldstone theorem for continuous non-invertible symmetries (2023)
Journal Article
Etxebarria, I. G., & Iqbal, N. (2023). A Goldstone theorem for continuous non-invertible symmetries. Journal of High Energy Physics, 2023(9), Article 145. https://doi.org/10.1007/jhep09%282023%29145

We study systems with an Adler-Bell-Jackiw anomaly in terms of non-invertible symmetry. We present a new kind of non-invertible charge defect where a key role is played by a local current operator localized on the defect. The charge defects are now l... Read More about A Goldstone theorem for continuous non-invertible symmetries.

Branes and symmetries for N = 3 S-folds (2023)
Journal Article
Etheredge, M., Etxebarria, I. G., Heidenreich, B., & Rauch, S. (2023). Branes and symmetries for N = 3 S-folds. Journal of High Energy Physics, 2023(9), Article 5. https://doi.org/10.1007/jhep09%282023%29005

We describe the higher-form and non-invertible symmetries of 4d N = 3 S-folds using the brane dynamics of their holographic duals. In cases with enhancement to N = 4 supersymmetry, our analysis reproduces the known field theory results of Aharony, Se... Read More about Branes and symmetries for N = 3 S-folds.

Symmetry TFTs from String Theory (2023)
Journal Article
Apruzzi, F., Bonetti, F., García Etxebarria, I., Hosseini, S. S., & Schäfer-Nameki, S. (2023). Symmetry TFTs from String Theory. Communications in Mathematical Physics, 402(1), 895-949. https://doi.org/10.1007/s00220-023-04737-2

We determine the d+1 dimensional topological field theory, which encodes the higher-form symmetries and their ’t Hooft anomalies for d-dimensional QFTs obtained by compactifying M-theory on a non-compact space X. The resulting theory, which we call t... Read More about Symmetry TFTs from String Theory.

2-Group symmetries and M-theory (2022)
Journal Article
Del Zotto, M., García Etxebarria, I., & Schäfer-Nameki, S. (2022). 2-Group symmetries and M-theory. SciPost Physics, 13(5), Article 105 (2022). https://doi.org/10.21468/scipostphys.13.5.105

Quantum Field Theories engineered in M-theory can have 2-group symmetries, mixing 0-form and 1-form symmetry backgrounds in non-trivial ways. In this paper we develop methods for determining the 2-group structure from the boundary geometry of the M-t... Read More about 2-Group symmetries and M-theory.

Branes and Non‐Invertible Symmetries (2022)
Journal Article
García Etxebarria, I. (2022). Branes and Non‐Invertible Symmetries. Fortschritte der Physik, 70(11), https://doi.org/10.1002/prop.202200154

=4 supersymmetric Yang-Mills theories with algebra𝔰𝔬(4N) and appropriate choices of global structure can have non-invertible symmetries. We identify the branes holographically dual to the non-invertible symmetries, and derive the fusion rules for th... Read More about Branes and Non‐Invertible Symmetries.

The Standard Model quiver in de Sitter string compactifications (2021)
Journal Article
Cicoli, M., García Etxebarria, I., Quevedo, F., Schachner, A., Shukla, P., & Valandro, R. (2021). The Standard Model quiver in de Sitter string compactifications. Journal of High Energy Physics, 2021(8), Article 109. https://doi.org/10.1007/jhep08%282021%29109

We argue that the Standard Model quiver can be embedded into compact Calabi-Yau geometries through orientifolded D3-branes at del Pezzo singularities dPn with n ≥ 5 in a framework including moduli stabilisation. To illustrate our approach, we explici... Read More about The Standard Model quiver in de Sitter string compactifications.

Higher form symmetries and M-theory (2020)
Journal Article
Albertini, F., Del Zotto, M., García Etxebarria, I., & Hosseini, S. S. (2020). Higher form symmetries and M-theory. Journal of High Energy Physics, 2020(12), Article 203. https://doi.org/10.1007/jhep12%282020%29203

We discuss the geometric origin of discrete higher form symmetries of quantum field theories in terms of defect groups from geometric engineering in M-theory. The flux non-commutativity in M-theory gives rise to (mixed) ’t Hooft anomalies for the def... Read More about Higher form symmetries and M-theory.

Nothing is certain in string compactifications (2020)
Journal Article
García Etxebarria, I., Montero, M., Sousa, K., & Valenzuela, I. (2020). Nothing is certain in string compactifications. Journal of High Energy Physics, 2020, Article 32. https://doi.org/10.1007/jhep12%282020%29032

A bubble of nothing is a spacetime instability where a compact dimension collapses. After nucleation, it expands at the speed of light, leaving “nothing” behind. We argue that the topological and dynamical mechanisms which could protect a compactific... Read More about Nothing is certain in string compactifications.