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The Matsubara Green's function formalism stands as a powerful technique forcomputing the thermodynamic characteristics of interacting quantummany-particle systems at finite temperatures. In this manuscript, our focuscenters on introducing MatsubaraFunctions.jl, a Julia library that implementsdata structures for generalized n-point Green's functions on Matsubarafrequency grids. The package's architecture prioritizes user-friendlinesswithout compromising the development of efficient solvers for quantum fieldtheories in equilibrium. Following a comprehensive introduction of thefundamental types, we delve into a thorough examination of key facets of theinterface. This encompasses avenues for accessing Green's functions, techniquesfor extrapolation and interpolation, as well as the incorporation of symmetriesand a variety of parallelization strategies. Examples of increasing complexityserve to demonstrate the practical utility of the library, supplemented bydiscussions on strategies for sidestepping impediments to optimal performance.

MatsubaraFunctions.jl: An equilibrium Green's function library in the Julia programming language