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1 találatból megjelenítve: 1-11
Cím: Instability induced renormalization
Szerző: ; ;
Dátum: 1999
Feltöltve: 2020-08-07
(1999)
It is pointed out that models with condensates have nontrivial renormalization group flow on the tree level. The infinitesimal form of the tree level renormalization group equation is obtained and solved numerically for ...
Cím: Projection method for rapid ab initio calculations of metals
Szerző: ;
Dátum: 2004
Feltöltve: 2020-08-08
(2004)
An improvement of the energy renormalization group method is proposed for systems with small gap, based on the projection methods developed by Feshbach. It is tested for the ground-state energy of the one-dimensional ...
Cím: Effective field theory for He4
Szerző: ; ; ;
Dátum: 2006
Feltöltve: 2020-08-08
(2006)
We introduce an effective scalar field theory to describe the He4 phase diagram, which can be considered as a generalization of the XY model which gives the usual λ transition. This theory results from a Ginzburg-Landau ...
Cím: Effective action and density-functional theory
Szerző: ;
Dátum: 2002
Feltöltve: 2020-08-08
(2002)
Cím: Current-density functional for disordered systems
Szerző:
Dátum: 2003
Feltöltve: 2020-08-08
(2003)
Cím: Casimir effect: Running Newton constant or cosmological term
Szerző: ;
Dátum: 2006
Feltöltve: 2020-08-07
(2006)
We argue that the instability of Euclidean Einstein gravity is an indication that the vacuum is non-perturbative and contains a condensate of the metric tensor in a manner reminiscent of Yang-Mills theories. As a simple ...
Cím: A lattice simulation of the SU(2) vacuum structure
Szerző: ;
Dátum: 1995
Feltöltve: 2020-08-07
(1995)
In this article we analyze the vacuum structure of pure SU(2) Yang-Mills using non-perturbative techniques. Monte Carlo simulations are performed for the lattice gauge theory with external sources to obtain the effective ...
Cím: Periodic vacuum and particles in two dimensions
Szerző: ;
Dátum: 2000
Feltöltve: 2020-08-07
(2000)
Cím: A new mechanism of mass protection for fermions
Szerző: ; ; ; ; ;
Dátum: 2000
Feltöltve: 2020-08-07
(2000)
We present a way of protecting a Dirac fermion interacting with a scalar (Higgs) field from getting a mass from the vacuum. It is obtained through an implementation of translational symmetry when the theory is formulated ...
Cím: Renormalization group in internal space
Szerző: ;
Dátum: 2005
Feltöltve: 2020-08-07
(2005)
Renormalization group in the internal space consists of the gradual change of the coupling constants. Functional evolution equations corresponding to the change of the mass or the coupling constant are presented in the ...
Cím: Path integral for the dirac equation
Szerző:
Dátum: 1999
Feltöltve: 2020-08-07
(1999)
A c-number path integral representation is constructed for the solution of the Dirac equation. The integration is over the real trajectories in the continuous three-space and other two canonical pairs of compact variables ...