Results 41 to 50 of about 3,488,460 (312)
LeClair-Mussardo series for two-point functions in Integrable QFT
Journal of High Energy Physics, 2018 We develop a well-defined spectral representation for two-point functions in relativistic Integrable QFT in finite density situations, valid for space-like separations.
B. Pozsgay, I.M. Szécsényi
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Properties of RG interfaces for 2D boundary flows
Journal of High Energy Physics, 2021 We consider RG interfaces for boundary RG flows in two-dimensional QFTs. Such interfaces are particular boundary condition changing operators linking the UV and IR conformal boundary conditions. We refer to them as RG operators.
Anatoly Konechny
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Weighting bubbles in group field theory [PDF]
Physical Review D, 2014 Group field theories (GFT) are higher dimensional generalizations of matrix models whose Feynman diagrams are dual to triangulations. Here we propose a modification of GFT models that includes extra field indices keeping track of the bubbles of the graphs in the Feynman evaluations.
Razvan Gurau +3 more
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Renormalization of Group Field Theories for Quantum Gravity: New Computations and Some Suggestions
Frontiers in Physics, 2021 We discuss motivation and goals of renormalization analyses of group field theory models of simplicial 4d quantum gravity, and review briefly the status of this research area.
Marco Finocchiaro +2 more
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Loop quantum cosmology from group field theory [PDF]
, 2014 We show that the effective dynamics of the recently proposed isotropic condensate state of group field theory with Laplacian kinetic operator can be equivalent to that of homogeneous and isotropic loop quantum cosmology in the improved dynamics ...
Calcagni, Gianluca
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Confinement in the tricritical Ising model
Physics Letters B, 2022 We study the leading and sub-leading magnetic perturbations of the thermal E7 integrable deformation of the tricritical Ising model. In the low-temperature phase, these magnetic perturbations lead to the confinement of the kinks of the model.
M. Lencsés, G. Mussardo, G. Takács
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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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Composite operators near the boundary
Journal of High Energy Physics, 2020 We use renormalization group methods to study composite operators existing at a boundary of an interacting conformal field theory. In particular we relate the data on boundary operators to short-distance (near-boundary) divergences of bulk two-point ...
Vladimír Procházka +1 more
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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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Recent Progress in Group Field Theory [PDF]
AIP Conference Proceedings, 2009 We introduce the key ideas behind the group field theory approach to quantum gravity, and the basic elements of its formalism. We also briefly report on some recent results obtained in this approach, concerning both the mathematical definition of these models, and possible avenues towards extracting interesting physics from them.
Daniele Oriti +3 more
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