Results 51 to 60 of about 3,569,422 (339)
Relational Hamiltonian for group field theory [PDF]
Physical Review D, 2019 Using a massless scalar field as a clock variable, the Legendre transform of the group field theory Lagrangian gives a relational Hamiltonian. In the classical theory, it is natural to define 'equal relational time' Poisson brackets, where 'equal time' corresponds to equal values of the scalar field clock.
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Homogeneous cosmologies as group field theory condensates [PDF]
Journal of High Energy Physics, 2014 We give a general procedure, in the group field theory (GFT) formalism for quantum gravity, for constructing states that describe macroscopic, spatially homogeneous universes. These states are close to coherent (condensate) states used in the description of Bose-Einstein condensates.
Gielen, S., Oriti, D., Sindoni, L.
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Scaling Algebras and Renormalization Group in Algebraic Quantum Field Theory [PDF]
, 1995 For any given algebra of local observables in Minkowski space an associated scaling algebra is constructed on which renormalization group (scaling) transformations act in a canonical manner. The method can be carried over to arbitrary spacetime manifolds
Buchholz, Detlev, Verch, Rainer
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Renyi relative entropies and renormalization group flows
Journal of High Energy Physics, 2018 Quantum Renyi relative entropies provide a one-parameter family of distances between density matrices, which generalizes the relative entropy and the fidelity. We study these measures for renormalization group flows in quantum field theory.
Horacio Casini +3 more
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Universe, 2020 This editorial introduces the Special Issue “Progress in Group Field Theory and Related Quantum Gravity Formalisms” which includes a number of research and review articles covering results in the group field theory (GFT) formalism for quantum
Sylvain Carrozza +2 more
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Gibbsing spacetime: a group field theory approach to equilibrium in quantum gravity
New Journal of Physics, 2018 The symmetries, subtle nature of observables, and lack of a preferred notion of time evolution all make defining a quantum statistical mechanics of general relativity difficult.
Hal M Haggard
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Analytic bootstrap for boundary CFT
Journal of High Energy Physics, 2019 We propose a method to analytically solve the bootstrap equation for two point functions in boundary CFT. We consider the analytic structure of the correlator in Lorentzian signature and in particular the discontinuity of bulk and boundary conformal ...
Agnese Bissi +2 more
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Renormalization and conformal invariance of non-local quantum electrodynamics
Journal of High Energy Physics, 2020 We study renormalization group flow in a non-local version of quantum electrodynamics (QED). We determine the regime in which the theory flows to a local theory in the infrared and study a possible UV completion of four-dimensional QED.
Matthew Heydeman +3 more
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Remarks on a melonic field theory with cubic interaction
Journal of High Energy Physics, 2021 We revisit the Amit-Roginsky (AR) model in the light of recent studies on Sachdev-Ye-Kitaev (SYK) and tensor models, with which it shares some important features.
Dario Benedetti, Nicolas Delporte
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The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley +1 more source