The universal one-loop effective action with gravity by Rémy Larue, Jérémie Quevillon

“…This efficient approach manifests an interesting novelty as it allows to integrate out chiral fermions in curved spacetime in a direct manner leading to new operators involving the curvature, and provides a new alternative to the use of Feynman diagrams in that regard. The method presented would very well fit in a code that performs CDE, offering the possibility to integrate out at one-loop fields on a curved spacetime background, including spin-2 fields, like the graviton. …”
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Quantum algorithm for Feynman loop integrals by Selomit Ramírez-Uribe, Andrés E. Rentería-Olivo, Germán Rodrigo, German F. R. Sborlini, Luiz Vale Silva

“…The two on-shell states of a Feynman propagator are identified with the two states of a qubit and a quantum algorithm is used to unfold the causal singular configurations of multiloop Feynman diagrams. To identify such configurations, we exploit Grover’s algorithm for querying multiple solutions over unstructured datasets, which presents a quadratic speed-up over classical algorithms when the number of solutions is much smaller than the number of possible configurations. …”
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Renormalization in Quantum Brain Dynamics by Akihiro Nishiyama, Shigenori Tanaka, Jack A. Tuszynski

“…First, we introduce the Lagrangian density for QBD involving terms of water rotational dipole fields, photon fields and their interactions. Next, we show Feynman diagrams with 1-loop self-energy and vertex function in dipole coupling expansion in QBD. …”
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Cwebs beyond three loops in multiparton amplitudes by Neelima Agarwal, Lorenzo Magnea, Sourav Pal, Anurag Tripathi

“…Abstract Correlators of Wilson-line operators in non-abelian gauge theories are known to exponentiate, and their logarithms can be organised in terms of collections of Feynman diagrams called webs. In [1] we introduced the concept of Cweb, or correlator web, which is a set of skeleton diagrams built with connected gluon correlators, and we computed the mixing matrices for all Cwebs connecting four or five Wilson lines at four loops. …”
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Grassmannization of classical models by Lode Pollet, Mikhail N Kiselev, Nikolay V Prokof’ev, Boris V Svistunov

“…The expansion of the latter around its Gaussian point generates Feynman diagrams. Our work paves the way for studying lattice gauge theories by treating bosonic and fermionic degrees of freedom on equal footing.…”
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CFT unitarity and the AdS Cutkosky rules by David Meltzer, Allic Sivaramakrishnan

“…We first revisit weakly-coupled CFTs in flat space, where the cuts are performed on Feynman diagrams. We then generalize these rules to strongly-coupled holographic CFTs, where the cuts are performed on the Witten diagrams of the dual theory. …”
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A novel approach to perturbative calculations for a large class of interacting boson theories by Kamil Brádler

“…The method does not rely on the position-based Feynman diagrams and promises to be extended to many perturbative models typically studied in quantum field theory. …”
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Highly Entangled Spin Chains and 2D Quantum Gravity by Fumihiko Sugino

“…As a study of the systems from a different viewpoint, we introduce large-<i>N</i> matrix models with so-called <inline-formula> <math display="inline"> <semantics> <mrow> <mi>A</mi> <mi>B</mi> <mi>A</mi> <mi>B</mi> </mrow> </semantics> </math> </inline-formula> interactions, in which correlation functions reproduce the entanglement scaling in tree and planar Feynman diagrams. Including loop diagrams naturally defines an extension of the Motzkin and Fredkin spin chains. …”
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Building blocks of Cwebs in multiparton scattering amplitudes by Neelima Agarwal, Sourav Pal, Aditya Srivastav, Anurag Tripathi

“…Abstract The correlators of Wilson-line operators in non-abelian gauge theories are known to exponentiate, and their logarithms can be organised in terms of the collections of Feynman diagrams called Cwebs. The colour factors that appear in the logarithm correspond to completely connected diagrams and are determined by the web mixing matrices. …”
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Double-Fock superposition interferometry for differential diagnosis of decoherence by Malte C Tichy, Young-Sik Ra, Hyang-Tag Lim, Clemens Gneiting, Yoon-Ho Kim, Klaus Mølmer

“…We introduce a versatile formalism for many-boson interferometry based on double-sided Feynman diagrams, which we apply to a protocol for differential decoherence diagnosis: twin-Fock states $\mid N,N\rangle $ with $N\geqslant 2$ reveal to what extent decoherence is due to path distinguishability or to mixing, while double-Fock superpositions $\mid N:M\rangle =\left( \mid N,M\rangle +\mid M,N\rangle \right)/\sqrt{2}$ with $N\gt M\gt 0$ additionally witness the degree of dephasing. …”
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N3LO gravitational spin-orbit coupling at order G 4 by Michèle Levi, Andrew J. McLeod, Matthew von Hippel

“…We provide the results for each of the Feynman diagrams in this sector. The three-loop graphs in the worldline picture give rise to new features in the spinning sector, including divergent terms and logarithms from dimensional regularization, as well as transcendental numbers, all of which survive in the final result of the topologies at this order. …”
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Long distance behavior of O(N)-model correlators in de Sitter space and the resummation of secular terms by Diana López Nacir, Francisco D. Mazzitelli, Leonardo G. Trombetta

“…We extend our previous results by computing the long wavelength limit of the two-point functions at next-to-leading order in 1/N and at leading order in the coupling constant, which involves a further resummation of Feynman diagrams (needed when the two-point functions are analitically continued). …”
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Wilsonian Effective Action and Entanglement Entropy by Satoshi Iso, Takato Mori, Katsuta Sakai

“…In previous papers, we have proposed the notion of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi mathvariant="double-struck">Z</mi><mi>M</mi></msub></semantics></math></inline-formula> gauge theory on Feynman diagrams to calculate EE in quantum field theories and shown that EE consists of two particular contributions from propagators and vertices. …”
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UV divergences, RG equations and high energy behaviour of the amplitudes in the Wess-Zumino model with quartic interaction by L. V. Bork, D. I. Kazakov

“…Within the superfield formalism, we calculate the corresponding Feynman diagrams and evaluate their leading divergences up to 4 loop order of PT. …”
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Scattering amplitudes from dispersive iterations of unitarity by Piotr Tourkine, Alexander Zhiboedov

“…There is a version of the iterative algorithm that is directly related to Feynman diagrams: it effectively re-sums infinitely many two-particle reducible planar Feynman graphs in the ϕ 4 theory, which remarkably produces a unitary nonperturbative scattering amplitude function. …”
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The correlahedron by Burkhard Eden, Paul Heslop, Lionel Mason

“…We construct such expressions in this bosonised space both directly, in general, from Feynman diagrams in twistor space, and then more invariantly from specific known correlator expressions in analytic superspace. …”
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Conformal quantum mechanics & the integrable spinning Fishnet by Sergey Derkachov, Enrico Olivucci

“…Such relations are interpreted in the language of Feynman diagrams as integral star-triangle identites between propagators of a conformal field theory. …”
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All point correlation functions in SYK by David J. Gross, Vladimir Rosenhaus

“…Abstract Large N melonic theories are characterized by two-point function Feynman diagrams built exclusively out of melons. This leads to conformal invariance at strong coupling, four-point function diagrams that are exclusively ladders, and higher-point functions that are built out of four-point functions joined together. …”
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The width of the higgs boson decay into two photons in framework of nmssm with CP violation: one loop approximation by Albina V Gurskaya

“…We use the method of quantum-field perturbation theory with Feynman diagrams. The results of calculations are presented graphically. …”
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QFT without infinities and hierarchy problem by Sander Mooij, Mikhail Shaposhnikov

“…This procedure uses divergent multi-loop Feynman diagrams, their regularisation to handle the UV divergences, and then renormalisation to remove them. …”
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