Zobrazeno 1 - 10
of 370
pro vyhledávání: '"Polonyi, J."'
Autor:
Nagy, S., Polonyi, J.
The renormalization group method, more specifically the Wegner-Houghton equation, is used to find first order phase transitions in a simple scalar field theory with a polynomial potential. An improved definition of the running parameters allows us to
Externí odkaz:
http://arxiv.org/abs/2405.11043
Autor:
Nagy, S., Polonyi, J.
The functional renormalization group flow of a scalar field theory with quartic couplings and a sharp spatial momentum cutoff is presented in four-dimensional Minkowski space-time for the bare action by retaining the entanglement of the IR and the UV
Externí odkaz:
http://arxiv.org/abs/2012.13811
The multiplicative and the functional renormalization group methods are applied for the four dimensional scalar theory in Minkowski space-time. It is argued that the appropriate choice of the subtraction point is more important in Minkowski than in E
Externí odkaz:
http://arxiv.org/abs/1908.11311
Akademický článek
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Publikováno v:
Phys. Rev. D 97, 085002 (2018)
The blocking step of the renormalization group method is usually carried out by restricting it to fluctuations and to local blocked action. The tree-level, bi-local saddle point contribution to the blocking, defined by the infinitesimal decrease of t
Externí odkaz:
http://arxiv.org/abs/1801.08171
The observed IR and the spectator UV particles of a regulated, cutoff quantum field theory are entangled by their interactions; hence, the IR sector can be described by the help of the density matrix only. The tree-level renormalized trajectory is ob
Externí odkaz:
http://arxiv.org/abs/1508.04277
It is shown in the case of proton scattering on an electron gas target that the Closed Time Path formalism can handle final state interactions of the target in equilibrium in a simple and natural manner. The leading order cross section is proportiona
Externí odkaz:
http://arxiv.org/abs/1302.5126
Red shift in communication and possibility of interaction is discussed for objects around the event horizon of Schwarzschild space-time. It is pointed out that the arrow of time within the horizon cannot always be inferred by observations carried out
Externí odkaz:
http://arxiv.org/abs/1201.4250
Publikováno v:
Phys.Lett.B694:89-93,2010
It is pointed out that increasingly attractive interactions, represented by partially concave local potential in the Lagrangian, may lead to the degeneracy of the blocked, renormalized action at the gliding cutoff scale by tree-level renormalization.
Externí odkaz:
http://arxiv.org/abs/0907.0496
Publikováno v:
Int.J.Mod.Phys.A26:1327-1345,2011
A numerical algorithm is used to solve the bare and the effective potential for the scalar $\phi^4$ model in the local potential approximation. An approximate dynamical Maxwell-cut is found which reveals itself in the degeneracy of the action for mod
Externí odkaz:
http://arxiv.org/abs/0907.0144