Zobrazeno 1 - 10
of 810
pro vyhledávání: '"Jurkiewicz J"'
Autor:
Czerwosz L, Szczepek E, Blaszczyk JW, Sokolowska B, Dmitruk K, Dudzinski K, Jurkiewicz J, Czernicki Z
Publikováno v:
European Journal of Medical Research, Vol 14, Iss Suppl 4, Pp 53-58 (2009)
Abstract Poor postural balance is one of the major risk factors for falling in normal pressure hydrocephalus (NPH). Postural instability in the clinic is commonly assessed based upon force platform posturography. In this study we focused on the ident
Externí odkaz:
https://doaj.org/article/0fe64635ebad422e8a19a9a64e17b7f1
Lattice formulations of gravity can be used to study non-perturbative aspects of quantum gravity. Causal Dynamical Triangulations (CDT) is a lattice model of gravity that has been used in this way. It has a built-in time foliation but is coordinate-i
Externí odkaz:
http://arxiv.org/abs/2103.15610
Using Monte-Carlo computer simulations, we study the impact of matter fields on the geometry of a typical quantum universe in the CDT model of lattice quantum gravity. The quantum universe has the size of a few Planck lengths and the spatial topology
Externí odkaz:
http://arxiv.org/abs/2103.00198
Using computer simulations we study the geometry of a typical quantum universe, i.e. the geometry one might expect before a possible period of inflation. We display it using coordinates defined by means of four classical scalar fields satisfying the
Externí odkaz:
http://arxiv.org/abs/2101.08617
Publikováno v:
Phys. Rev. D 103, 086022 (2021)
We investigate the geometry of a quantum universe with the topology of the four-torus. The study of non-contractible geodesic loops reveals that a typical quantum geometry consists of a small semi-classical toroidal bulk part, dressed with many outgr
Externí odkaz:
http://arxiv.org/abs/2007.13311
A hallmark of non-perturbative theories of quantum gravity is the absence of a fixed background geometry, and therefore the absence in a Planckian regime of any notion of length or scale that is defined a priori. This has potentially far-reaching con
Externí odkaz:
http://arxiv.org/abs/2002.01693
Publikováno v:
Class. Quantum Grav. 36, 224001 (2019)
Four-dimensional CDT (causal dynamical triangulations) is a lattice theory of geometries which one might use in an attempt to define quantum gravity non-perturbatively, following the standard procedures of lattice field theory. Being a theory of geom
Externí odkaz:
http://arxiv.org/abs/1904.05755
Publikováno v:
Phys. Rev. D 95, 124029 (2017)
We reinvestigate the recently discovered bifurcation phase transition in Causal Dynamical Triangulations (CDT) and provide further evidence that it is a higher order transition. We also investigate the impact of introducing matter in the form of mass
Externí odkaz:
http://arxiv.org/abs/1704.04373
Causal Dynamical Triangulations (CDT), a candidate theory of nonperturbative quantum gravity in 4D, turns out to have a rich phase structure. We investigate the recently discovered bifurcation phase $C_b$ and relate some of its characteristics to the
Externí odkaz:
http://arxiv.org/abs/1610.05245
Publikováno v:
JHEP02(2016)144
This work focuses on the newly discovered bifurcation phase transition of CDT quantum gravity. We define various order parameters and investigate which is most suitable to study this transition in numerical simulations. By analyzing the behaviour of
Externí odkaz:
http://arxiv.org/abs/1510.08672