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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.12104 |
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| _version_ | 1866914188368019456 |
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| author | Garousi, Mohammad R. |
| author_facet | Garousi, Mohammad R. |
| contents | The classical effective action in string theory is background-independent, and its invariance under the Buscher rules constrains its form up to a few parameters. This work investigates how this picture changes at the quantum level, where loop corrections introduce an inherent background dependence. We propose a T-duality map for the loop-level effective action. It connects the circle-reduced effective action at large radius, where loops include only Kaluza-Klein (KK) momentum modes, to the base-space effective action at small radius, where loops include only winding modes. The resulting effective action is fundamentally distinct: it cannot be obtained from the KK reduction of any standard higher-dimensional action, revealing a uniquely stringy phenomenon at the loop level. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_12104 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | T-duality and background-dependence in genus corrections to effective actions Garousi, Mohammad R. High Energy Physics - Theory The classical effective action in string theory is background-independent, and its invariance under the Buscher rules constrains its form up to a few parameters. This work investigates how this picture changes at the quantum level, where loop corrections introduce an inherent background dependence. We propose a T-duality map for the loop-level effective action. It connects the circle-reduced effective action at large radius, where loops include only Kaluza-Klein (KK) momentum modes, to the base-space effective action at small radius, where loops include only winding modes. The resulting effective action is fundamentally distinct: it cannot be obtained from the KK reduction of any standard higher-dimensional action, revealing a uniquely stringy phenomenon at the loop level. |
| title | T-duality and background-dependence in genus corrections to effective actions |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2503.12104 |