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Chiral Perturbation Theory at NNNLO
Published 2020-07-01Subjects: “…chiral perturbation theory…”
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Flow-oriented perturbation theory
Published 2023-01-01“…Abstract We introduce a new diagrammatic approach to perturbative quantum field theory, which we call flow-oriented perturbation theory (FOPT). Within it, Feynman graphs are replaced by strongly connected directed graphs (digraphs). …”
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Perturbation Theory for Quasinilpotents in Banach Algebras
Published 2020-07-01Subjects: “…perturbation theory…”
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Perturbation theory with quantum signal processing
Published 2023-05-01“…Perturbation theory is an important technique for reducing computational cost and providing physical insights in simulating quantum systems with classical computers. …”
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Applications Of Perturbation Theory To Acoustic Logging
Published 2012“…For guided wave propagation in boreholes, perturbation theory is used to calculate (1) the partial derivative of the wavenumber or frequency with respect to an elastic modulus or density, (2) group velocity, and (3) the effect of a borehole with a slightly irregular cross section upon the phase velocity. …”
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The breakdown of resummed perturbation theory at high energies
Published 2022-03-01“…In some scenarios, already tree-level computations may enter the regime of large-order perturbation theory and therefore require a careful investigation. …”
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