Sigma model instantons and singular tau function
The generating series for the instanton contribution to Green functions of the $2D$ sigma model was found in the works of Schwarz, Fateev and Frolov. We show that this series can be written as a formal tau function of the two-sided two-component KP hierarchy. We call it formal singular tau function...
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| Hlavní autoři: | , |
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| Médium: | Artigo |
| Jazyk: | Inglês |
| Vydáno: |
International Society of Nonlinear Mathematical Physics
2024-02-01
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| Edice: | Open Communications in Nonlinear Mathematical Physics |
| Témata: | |
| On-line přístup: | http://ocnmp.episciences.org/12938/pdf |
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