Abstract
Meromorphic germs in several variables with linear poles naturally arise in mathematics in various disguises. We investigate their rich structures under the prism of locality, including locality subalgebras, locality transformation groups and locality characters. The key technical tool is the dependence subspace for a meromorphic germ with which we define a locality orthogonal relation between two meromorphic germs. We describe the structure of locality subalgebras generated by classes of meromorphic germs with certain types of poles. We also define and determine their group of locality transformations which fix the holomorphic germs and preserve multivariable residues, a group we call the locality Galois group. We then specialise to two classes of meromorphic germs with prescribed types of nested poles, arising from multiple zeta functions in number theory and Feynman integrals in perturbative quantum field theory respectively. We show that they are locality polynomial subalgebras with locality polynomial bases given by the locality counterpart of Lyndon words. This enables us to explicitly describe their locality Galois groups. As an application, we propose a mathematical interpretation of Speer’s analytic renormalisation for Feynman amplitudes. We study a class of locality characters, called generalised evaluators after Speer. We show that the locality Galois group acts transitively on generalised evaluators by composition, thus providing a candidate for a renormalisation group in this multivariable approach.
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References
Bellon, M.P., Russo, E.I.: Ward–Schwinger–Dyson equations in \(\varphi ^3_6\) quantum field theory. Lett. Math. Phys. 111(42), 31 (2021)
Berline, N., Vergne, M.: Local Euler–Maclaurin formula for polytopes. Mosc. Math. J. 7, 355–386 (2007)
Berline, N., Vergne, M.: The equivariant Todd genus of a complete toric variety, with Danilov condition. J. Algebra 313, 28–39 (2007)
Bogoliubov, N., Parasiuk, O.S.: Über die Multiplikation der Kausalfunktionen in der Quantentheorie der Felder. Acta Math. 97, 227–266 (1957)
Brown, F.: Feynman amplitudes, coaction principle, and cosmic Galois group. Commun. Number Theory Phys. 11, 453–556 (2017)
Cartier, P.: A mad day’s work: from Gröthendieck to Connes and Kontsevich. Bull. Am. Math. Soc. (N.S.) 38, 389–408 (2001)
Chen, K.T., Fox, R.H., Lyndon, R.C.: Free differential calculus, IV. The quotient groups of the lower central series. Ann. Math. 68, 81–95 (1958)
Clavier, P., Guo, L., Paycha, S., Zhang, B.: An algebraic formulation of the locality principle in renormalisation. Eur. J. Math. 5, 356–394 (2019)
Clavier, P., Guo, L., Paycha, S., Zhang, B.: Renormalisation and locality: branched zeta values. IRMA Lect. Math. Theor. Phys. 32, 85–132 (2020)
Clavier, P., Guo, L., Paycha, S., Zhang, B.: Locality and renormalisation: universal properties and integrals on trees. J. Math. Phys. 61, 19 (2020)
Connes, A., Kreimer, D.: Renormalisation in quantum field theory and the Riemann-Hilbert problem. I. The Hopf algebra structure of graphs and the main theorem. Commun. Math. Phys. 210, 249–273 (2000)
Connes, A., Kreimer, D.: Renormalisation in quantum field theory and the Riemann–Hilbert problem. II. The \(\beta \)-function, diffeomorphisms and the renormalization group. Commun. Math. Phys. 216, 215–241 (2001)
Connes, A., Marcolli, M.: Noncommutative Geometry, Quantum Fields and Motives. Amer. Math. Soc. (2019)
Dahmen, R., Paycha, S., Schmeding, A.: The space of meromorphic functions in several variables with linear poles: topological structure. arXiv:2206.13993
Dang, N.V., Zhang, B.: Renormalization of Feynman amplitudes on manifolds by spectral zeta regularization and blow-ups. J. Eur. Math. Soc. 23, 503–556 (2021)
Fischer, B., Pommersheim, J.: An algebraic construction of sum-integral interpolators. Pacific J Math. 318, 305–38 (2022)
Guo, L., Paycha, S., Zhang, B.: Conical zeta values and their double subdivision relations. Adv. Math. 252, 343–381 (2014)
Guo, L., Paycha, S., Zhang, B.: Renormalisation and the Euler–Maclaurin formula on cones. Duke Math J. 166, 537–571 (2017)
Guo, L., Paycha, S., Zhang, B.: A conical approach to Laurent expansions for multivariate meromorphic germs with linear poles. Pacific J. Math 307, 159–196 (2020)
Guo, L., Paycha, S., Zhang, B.: Mathematical reflections on locality, Jahresbericht der Deutschen Mathematiker-Vereinigung (2023). https://link.springer.com/article/10.1365/s13291-023-00268-w
Guo, L., Xie, B.: The shuffle relation of fractions from multiple zeta values. Ramanujan J. 25, 307–317 (2011)
Guo, L., Zhang, B.: Renormalization of multiple zeta values. J. Algebra 319, 3770–3809 (2008)
Hepp, K.: Proof of the Bogoliubov–Parasiuk theorem on renormalization. Commun. Math. Phys. 2, 301–326 (1966)
’t Hooft, G.: Dimensional regularization and the renormalization group. Nucl. Phys. B 61, 455–468 (1973)
Hooft, G., Veltman, M.: Regularization and renormalization of gauge fields. Nucl. Phys. B 44, 189–213 (1972)
Ihara, K., Kaneko, M., Zagier, D.: Derivation and double shuffle relations for multiple zeta values. Compositio Math 142, 307–338 (2006)
Manchon, D., Paycha, S.: Nested sums of symbols and renormalized multiple zeta values. Int. Math. Res. Not. IMRN 24, 4628–4697 (2010)
Pommersheim, J.E.: Toric varieties, lattice points and Dedekind sums. Math. Ann. 295(1), 1–24 (1993)
Radford, D.E.: A natural ring basis for the shuffle algebra and an application to group schemes. J. Algebra 58, 432–454 (1979)
Rejzner, K.: Locality and causality in perturbative algebraic quantum field theory. J. Math. Phys. 60, 122301 (2019)
Speer, E.: Analytic renormalization. J. Math. Phys. 9, 1040 (1968)
Speer, E.: On the structure of analytic renormalization. Commun. Math. Phys. 23, 23–36. Added note: Comm. Math. Phys. 25(1972), 336 (1971)
Speer, E.: Lectures on analytic renormalisation, Technical Report No. 73-067 (1972)
Speer, E.: Analytic renormalization using many space-time dimensions. Commun. Math. Phys. 37, 83–92 (1974)
Zhao, J.: Multiple Zeta Functions, Multiple Polylogarithms and Their Special Values. World Scientific, Singapore (2016)
Zimmermann, W.: Convergence of Bogoliubov’s method of renormalization in momentum space. Commun. Math. Phys. 15, 208–234 (1969)
Acknowledgements
The second author is grateful to the Perimeter Institute in Waterloo where she was hosted on an Emmy Noether fellowship. This research is supported by the National Natural Science Foundation of China (11890663 and 11821001).
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Guo, L., Paycha, S. & Zhang, B. Locality Galois Groups of Meromorphic Germs in Several Variables. Commun. Math. Phys. 405, 28 (2024). https://doi.org/10.1007/s00220-023-04915-2
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DOI: https://doi.org/10.1007/s00220-023-04915-2