Results 21 to 30 of about 488,642 (308)
Quantum Fluctuations in the Effective Relational GFT Cosmology
Frontiers in Astronomy and Space Sciences, 2021 We analyze the size and evolution of quantum fluctuations of cosmologically relevant geometric observables, in the context of the effective relational cosmological dynamics of GFT models of quantum gravity.
L. Marchetti +3 more
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Group Field Theory: An Overview [PDF]
International Journal of Theoretical Physics, 2005 We give a brief overview of the properties of a higher dimensional generalization of matrix model which arises naturally in the context of a background independent approach to quantum gravity, the so called group field theory. We show that this theory leads to a natural proposal for the physical scalar product of quantum gravity.
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Aspects of group field theory [PDF]
AIP Conference Proceedings, 2012 I review the basic ingredients of discretized gravity which motivate the introduction of Group Field Theory. Thus I describe the GFT formulation of some models and conclude with a few remarks on the emergence of noncommutative structures in such models.
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EPRL/FK group field theory [PDF]
EPL (Europhysics Letters), 2010 The purpose of this short note is to clarify the Group Field Theory vertex and propagators corresponding to the EPRL/FK spin foam models and to detail the subtraction of leading divergences of the model.
Geloun, Joseph Ben +2 more
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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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Classical group field theory [PDF]
Journal of Mathematical Physics, 2012 The ordinary formalism for classical field theory is applied to dynamical group field theories. Focusing first on a local group field theory over one copy of SU(2) and then, on more involved nonlocal theories (colored and noncolored) defined over a tensor product of the same group, we address the issue of translation and dilatation symmetries and the ...
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Field theory entropy, the H theorem, and the renormalization group [PDF]
, 1996 We consider entropy and relative entropy in field theory and establish relevant monotonicity properties with respect to the couplings. The relative entropy in a field theory with a hierarchy of renormalization-group fixed points ranks the fixed points ...
O'Connor, Denjoe +3 more
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Hamiltonian truncation approach to quenches in the Ising field theory
Nuclear Physics B, 2016 In contrast to lattice systems where powerful numerical techniques such as matrix product state based methods are available to study the non-equilibrium dynamics, the non-equilibrium behaviour of continuum systems is much harder to simulate.
T. Rakovszky +4 more
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Colored Group Field Theory [PDF]
Communications in Mathematical Physics, 2011 Group field theories are higher dimensional generalizations of matrix models. Their Feynman graphs are fat and in addition to vertices, edges and faces, they also contain higher dimensional cells, called bubbles. In this paper, we propose a new, fermionic Group Field Theory, posessing a color symmetry, and take the first steps in a systematic study of ...
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Double field theory on group manifolds [PDF]
Journal of High Energy Physics, 2015 A new version of double field theory (DFT) is derived for the exactly solvable background of an in general left-right asymmetric WZW model in the large level limit. This generalizes the original DFT that was derived via expanding closed string field theory on a torus up to cubic order.
Ralph Blumenhagen +2 more
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