Results 61 to 70 of about 232,322 (217)
The renormalization group via statistical inference
New Journal of Physics, 2015 In physics, one attempts to infer the rules governing a system given only the results of imperfect measurements. Hence, microscopic theories may be effectively indistinguishable experimentally.
Cédric Bény, Tobias J Osborne
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Effective action for the Yukawa model in curved spacetime
Journal of High Energy Physics, 2018 We consider the one-loop renormalization of a real scalar field interacting with a Dirac spinor field in curved spacetime. A general Yukawa interaction is considered which includes both a scalar and a pseudoscalar coupling. The scalar field is assumed to
David J. Toms
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Renormalization of Long-wavelength Solution of Einstein Equation [PDF]
Phys.Rev. D60 (1999) 104011, 1999 Using the renormalization group method, we improved the first order solution of the long-wavelength expansion of the Einstein equation. By assuming that the renormalization group transformation has the property of Lie group, we can regularize the secular divergence caused by the spatial gradient terms and absorb it to the background seed metric.
arxiv +1 more source
Renormalization group analysis for thermal turbulence
International Journal of Mathematics and Mathematical Sciences, 1997 Renormalization group theory is applied to thermal turbulence. Turbulent fluxes for the flow are accounted for by repeatedly recasting the governing equations with the smallest scales represented by effective larger scales.
D. N. Riahi
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Cluster functional renormalization group [PDF]
Physical Review B, 2014 Functional renormalization group (FRG) has become a diverse and powerful tool to derive effective low-energy scattering vertices of interacting many-body systems. Starting from a non-interacting expansion point of the action, the flow of the RG parameter Lambda allows to trace the evolution of the effective one-particle and two-particle vertices ...
Reuther, Johannes, Thomale, Ronny
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Functional renormalization group flow of massive gravity
European Physical Journal C: Particles and Fields, 2020 We apply the functional renormalization group equation to a massive Fierz–Pauli action in curved space and find that, even though a massive term is a modification in the infrared sector, the mass term modifies the value of the non-gaussian fixed point in
Maximiliano Binder, Iván Schmidt
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Five-loop anomalous dimensions of ϕ Q operators in a scalar theory with O(N) symmetry
Journal of High Energy Physics, 2022 We compute the complete Q-dependence of anomalous dimensions of traceless symmetric tensor operator ϕ Q in O(N) scalar theory to five-loop. The renormalization factors are extracted from ϕ Q → Q ϕ form factors, and the integrand of form factors are ...
Qingjun Jin, Yi Li
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Microcanonical Renormalization Group [PDF]
Physical Review Letters, 1984 We argue that microcanonical Monte Carlo techniques can provide direct information on the values of renormalized coupling constants in numerical renormalization-group studies. The method is tested on SU(2) lattice gauge theory with fundamental and adjoint couplings and on the two-dimensional O(3) Heisenberg model.
Creutz, M +3 more
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Analytic response theory for the density matrix renormalization group [PDF]
, 2009 We propose an analytic response theory for the density matrix renormalization group whereby response properties correspond to analytic derivatives of density matrix renormalization group observables with respect to the applied perturbations. Both static and frequency-dependent response theories are formulated and implemented.
arxiv +1 more source
A note on defect stability in d = 4 − ε
Journal of High Energy PhysicsWe explore the space of scalar line, surface and interface defect field theories in d = 4 − ε by examining their stability properties under generic deformations.
William H. Pannell
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