Crossing bridges with strong Szeg? limit theorem

نویسندگان

چکیده

A bstract We develop a new technique for computing class of four-point correlation functions heavy half-BPS operators in planar $$ \mathcal{N} N = 4 SYM theory which admit factorization into product two octagon form factors with an arbitrary bridge length. show that the can be expressed as Fredholm determinant integrable Bessel operator and demonstrate this representation is very efficient finding octagons both at weak strong coupling. At coupling, limit when four become null separated sequential manner, obeys Toda lattice equations found closed form. we exploit Szeg? theorem to derive leading asymptotic behavior and, then, apply method differential determine remaining subleading terms coupling expansion any order inverse To achieve goal, generalize results available literature operator. As byproduct our analysis, formulate Szeg?-Akhiezer-Kac formula Fisher-Hartwig singularity systematic approach account power suppressed contributions.

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ژورنال

عنوان ژورنال: Journal of High Energy Physics

سال: 2021

ISSN: ['1127-2236', '1126-6708', '1029-8479']

DOI: https://doi.org/10.1007/jhep04(2021)257