Exact Renormalization Groups As a Form of Entropic Dynamics by Pedro Pessoa, Ariel Caticha

“…The Renormalization Group (RG) is a set of methods that have been instrumental in tackling problems involving an infinite number of degrees of freedom, such as, for example, in quantum field theory and critical phenomena. What all these methods have in common—which is what explains their success—is that they allow a systematic search for those degrees of freedom that happen to be relevant to the phenomena in question. …”
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Black Holes and Other Clues to the Quantum Structure of Gravity by Steven B. Giddings

“…Perturbative gravity results indicate a structure different from that of quantum field theory, but suggest an avenue to defining subsystems. …”
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Efficient world-line-based quantum Monte Carlo method without Hubbard–Stratonovich transformation by J. Wang, W. Pan, D. Y. Sun

“…Abstract By precisely writing down the matrix element of the local Boltzmann operator ( $${\mathrm{e}}^{-\tau h}$$ e - τ h , where $$h$$ h is the Hermitian conjugate pairs of off-diagonal operators), we have proposed a new path integral formulation for quantum field theory and developed a corresponding Monte Carlo algorithm. …”
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Stampedes I: fishnet OPE and octagon Bootstrap with nonzero bridges by Enrico Olivucci, Pedro Vieira

“…Abstract Some quantities in quantum field theory are dominated by so-called leading logs and can be re-summed to all loop orders. …”
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Comments on the Transplanckian Censorship Conjecture by Michael Dine, Yan Yu

“…We consider some aspects of tunneling to an isolated ground state in the presence of time-varying fields, in quantum mechanics and quantum field theory in the absence of gravitation, and note that lifetimes are typically enormous; in fact, there is often a finite probability for the system to remain eternally in its original state. …”
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The Metric Operator and the Functional Integral Formulation of Pseudo-Hermitian Quantum Mechanics by H. F. Jones

“…With possible generalizations to quantum field theory in mind, it is important to ask how the functional integral formalism for pseudo-Hermitian theories differs from that of standard theories. …”
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Traveling wave solutions, numerical solutions, and stability analysis of the (2+1) conformal time-fractional generalized q-deformed sinh-Gordon equation by Ali Khalid K.

“…The two-dimensional conformal time-fractional generalized qq-deformed sinh-Gordon equation has been used to model a variety of physical systems, including soliton propagation in asymmetric media, nonlinear waves in optical fibers, quantum field theory, and condensed matter physics. The equation is able to capture the complex dynamics of these systems and has been shown to be a powerful tool for studying them. …”
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Quantum signatures in nonlinear gravitational waves by Thiago Guerreiro, Francesco Coradeschi, Antonia Micol Frassino, Jennifer Rittenhouse West, Enrico Junior Schioppa

“…The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. …”
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Hamiltonian Truncation with larger dimensions by Joan Elias Miró, James Ingoldby

“…Abstract Hamiltonian Truncation (HT) is a numerical approach for calculating observables in a Quantum Field Theory non-perturbatively. This approach can be applied to theories constructed by deforming a conformal field theory with a relevant operator of scaling dimension ∆. …”
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Universality in the tripartite information after global quenches: (generalised) quantum XY models by Vanja Marić, Maurizio Fagotti

“…We identify settings in which I 3 α $$ {I}_3^{\left(\alpha \right)} $$ remains nonzero also in the limit of infinite lengths and develop an effective quantum field theory description of free fermionic fields on a ladder. …”
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Approximate Calculation of Functional Integrals Generated by Nonrelativistic and Relativistic Hamiltonians by Edik Ayryan, Michal Hnatic, Juha Honkonen, Victor Malyutin

“…Review of works devoted to the application of functional integrals in quantum mechanics and quantum field theory, nuclear physics and in other areas is presented. …”
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Quantum critical Eliashberg theory, the Sachdev-Ye-Kitaev superconductor and their holographic duals by Gian-Andrea Inkof, Koenraad Schalm, Jörg Schmalian

“…The former includes a strongly retarded pairing interaction of ill-defined fermions, the latter is rooted in the duality of quantum field theory and gravity theory. We demonstrate that both are different perspectives of the same theory. …”
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Null Wave Front and Ryu–Takayanagi Surface by Jun Tsujimura, Yasusada Nambu

“…The Ryu–Takayanagi formula provides the entanglement entropy of quantum field theory as an area of the minimal surface (Ryu–Takayanagi surface) in a corresponding gravity theory. …”
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Irreversibility, QNEC, and defects by Horacio Casini, Ignacio Salazar Landea, Gonzalo Torroba

“…Abstract We first present an analysis of infinitesimal null deformations for the entanglement entropy, which leads to a major simplification of the proof of the C, F and A-theorems in quantum field theory. Next, we study the quantum null energy condition (QNEC) on the light-cone for a CFT. …”
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Entropic Dynamics on Gibbs Statistical Manifolds by Pedro Pessoa, Felipe Xavier Costa, Ariel Caticha

“…Its successes include the derivation of quantum mechanics and quantum field theory from probabilistic principles. Here, we develop the entropic dynamics of a system, the state of which is described by a probability distribution. …”
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Sub-GeV dark matter in superfluid He-4: an effective theory approach by Francesca Acanfora, Angelo Esposito, Antonio D. Polosa

“…Abstract We employ an effective field theory to study the detectability of sub-GeV dark matter through its interaction with the gapless excitations of superfluid $$^4$$ 4 He. In a quantum field theory language, the possible interactions between the dark matter and the superfluid phonon are solely dictated by symmetry. …”
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Bayesian inference for form-factor fits regulated by unitarity and analyticity by J. M. Flynn, A. Jüttner, J. T. Tsang

“…In this novel approach the latter two properties of quantum-field theory regulate the ill-posed fitting problem and allow model-independent predictions over the entire physical range. …”
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Vacuum Polarization with Zero-Range Potentials on a Hyperplane by Davide Fermi

“…Perfectly reflecting and semitransparent surfaces are both taken into account, making reference to the most general local, homogeneous and isotropic boundary conditions compatible with the unitarity of the quantum field theory. The renormalized vacuum polarization is computed for both zero and non-zero mass of the field, implementing a local version of the zeta regularization technique. …”
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One Antimatter— Two Possible Thermodynamics by Alexander Y. Klimenko, Ulrich Maas

“…Here we refer to invariance of physical laws under charge (C), parity (P) and time reversal (T) transformations. While in quantum field theory CPT invariance is a theorem confirmed by experiments, the symmetry principles applied to macroscopic phenomena or to the whole of the Universe represent only hypotheses. …”
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Relativistic Time-of-Arrival Measurements: Predictions, Post-Selection and Causality Problems by Charis Anastopoulos, Maria-Electra Plakitsi

“…We analyze time-of-arrival probability distributions for relativistic particles in the context of quantum field theory (QFT). We show that QFT leads to a unique prediction, modulo post-selection that incorporates properties of the apparatus into the initial state. …”
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