Results 21 to 30 of about 3,241 (217)
Finite quantum field theory and renormalization group [PDF]
The European Physical Journal Plus, 2021 Renormalization group methods are applied to a scalar field within a finite, nonlocal quantum field theory formulated perturbatively in Euclidean momentum space. It is demonstrated that the triviality problem in scalar field theory, the Higgs boson mass hierarchy problem and the stability of the vacuum do not arise as issues in the theory.
Green, M. A., Moffat, J. W.
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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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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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QUANTUM GROUPS AND FIELD THEORY [PDF]
Modern Physics Letters A, 2000 When the symmetry of a physical theory describing a finite system is deformed by replacing its Lie group by the corresponding quantum group, the operators and state function will lie in a new algebra describing new degrees of freedom. If the symmetry of a field theory is deformed in this way, the enlarged state space will again describe additional ...
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Conformal Field Theories with Sporadic Group Symmetry [PDF]
Communications in Mathematical Physics, 2021 The monster sporadic group is the automorphism group of a central charge $c=24$ vertex operator algebra (VOA) or meromorphic conformal field theory (CFT). In addition to its $c=24$ stress tensor $T(z)$, this theory contains many other conformal vectors of smaller central charge; for example, it admits $48$ commuting $c=\frac12$ conformal vectors whose ...
Jin-Beom Bae +4 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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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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Inverse Renormalization Group in Quantum Field Theory [PDF]
Physical Review Letters, 2022 We propose inverse renormalization group transformations within the context of quantum field theory that produce the appropriate critical fixed point structure, give rise to inverse flows in parameter space, and evade the critical slowing down effect in calculations pertinent to criticality.
Bachtis, Dimitrios +3 more
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Overlaps after quantum quenches in the sine-Gordon model
Physics Letters B, 2017 We present a numerical computation of overlaps in mass quenches in sine-Gordon quantum field theory using truncated conformal space approach (TCSA). To improve the cut-off dependence of the method, we use a novel running coupling definition which has a ...
D.X. Horváth, G. Takács
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Nuclear Physics B, 2015 We study the SU(2)k Wess–Zumino–Novikov–Witten (WZNW) theory perturbed by the trace of the primary field in the adjoint representation, a theory governing the low-energy behavior of a class of strongly correlated electronic systems.
R.M. Konik +3 more
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