Gluonic corrections to quark vacuum condensate contributions to two-point functions in QCD

1982 ◽  
Vol 12 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Pedro Pascual ◽  
Eduardo Rafael
Keyword(s):  
Vacuum Condensate

scholarly journals Vacuum Condensate Picture of Quantum Gravity

Symmetry ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 87 ◽  
Author(s):  
Herbert Hamber
Keyword(s):  
Quantum Gravity ◽  
Physical Vacuum ◽  
Vacuum Condensate ◽  
Analytical Treatment ◽  
Long Distance ◽  
Gravitational Vacuum ◽  
Analytic Behavior ◽  
Distance Behavior ◽  
Gravity Perturbation ◽  
New Phase

In quantum gravity perturbation theory in Newton’s constant G is known to be badly divergent, and as a result not very useful. Nevertheless, some of the most interesting phenomena in physics are often associated with non-analytic behavior in the coupling constant and the existence of nontrivial quantum condensates. It is therefore possible that pathologies encountered in the case of gravity are more likely the result of inadequate analytical treatment, and not necessarily a reflection of some intrinsic insurmountable problem. The nonperturbative treatment of quantum gravity via the Regge–Wheeler lattice path integral formulation reveals the existence of a new phase involving a nontrivial gravitational vacuum condensate, and a new set of scaling exponents characterizing both the running of G and the long-distance behavior of invariant correlation functions. The appearance of such a gravitational condensate is viewed as analogous to the (equally nonperturbative) gluon and chiral condensates known to describe the physical vacuum of QCD. The resulting quantum theory of gravity is highly constrained, and its physical predictions are found to depend only on one adjustable parameter, a genuinely nonperturbative scale ξ in many ways analogous to the scaling violation parameter Λ M ¯ S of QCD. Recent results point to significant deviations from classical gravity on distance scales approaching the effective infrared cutoff set by the observed cosmological constant. Such subtle quantum effects are expected to be initially small on current cosmological scales, but could become detectable in future high precision satellite experiments.

scholarly journals Space-Time Curvature Of General Relativity And Energy Density Of A Three-Dimensional Quantum Vacuu

2015 ◽  
Vol 69 (1) ◽  
Author(s):  
Davide Fiscaletti ◽  
Amrit Sorli
Keyword(s):  
General Relativity ◽  
Energy Density ◽  
Vacuum Energy ◽  
Three Dimensional ◽  
Space Time ◽  
Vacuum Energy Density ◽  
Quantum Vacuum ◽  
Vacuum Condensate ◽  
Interesting Solution ◽  
Variable Energy

AbstractA three-dimensional quantum vacuum condensate is introduced as a fundamental medium from which gravity emerges in a geometro-hydrodynamic limit. In this approach, the curvature of space-time characteristic of general relativity is obtained as a mathematical value of a more fundamental actual variable energy density of quantum vacuum which has a concrete physical meaning. The fluctuations of the quantum vacuum energy density suggest an interesting solution for the dark energy problem.

Specific features of light scattering by a surface with aluminum low-vacuum condensate layers of various microrelief

1993 ◽  
Vol 59 (1-2) ◽  
pp. 592-596
Author(s):  
I. Kh. Tartakovskaya ◽  
N. N. Chirkina ◽  
V. A. Dudkin ◽  
A. I. Kleimenov
Keyword(s):  
Light Scattering ◽  
Vacuum Condensate

ELECTROWEAK MAGNETISM: THEORY AND APPLICATIONS

1990 ◽  
Vol 05 (23) ◽  
pp. 4525-4557 ◽  
Author(s):  
J. AMBJØRN ◽  
P. OLESEN
Keyword(s):  
Higgs Mass ◽  
Cosmic Strings ◽  
Z Bosons ◽  
High Energy ◽  
Asymptotic Freedom ◽  
Vacuum Condensate ◽  
Magnetic Instability ◽  
High Energy Collisions ◽  
Special Case ◽  
Symmetric Phase

The classical electroweak theory is unstable for magnetic fields H satisfying [Formula: see text], mw being the W mass. We discuss the origin of this instability and the peculiar anti-screening property of the W-condensate formed. The anti-screening is closely related to the asymptotic freedom of the SU (2)w-fields. Assuming that the Higgs mass mh>mw there will be a restoration of SU (2)w× U y(1) symmetry for [Formula: see text]. By using Bogomol’nyi’s method in the special case where the mass of the Z-particle mz=mh we can find static magnetic solutions with a vacuum condensate of W- and Z-bosons. This class of non-perturbative solutions interpolate between the constant magnetic field in the broken phase [Formula: see text] and a constant U y(1) field in the symmetric phase [Formula: see text]. The consequences of this magnetic instability are discussed in the cases of superconducting cosmic strings, high temperatures (the early universe) and high energy collisions.

Mass gap and quark confinement due to a novel vacuum condensate in Yang-Mills theory

2003 ◽  
Vol 721 ◽  
pp. C891-C894
Author(s):  
K.-I. Kondo ◽  
T. Iamai ◽  
H. Kato ◽  
T. Murakami ◽  
T. Shinohara
Keyword(s):  
Quark Confinement ◽  
Vacuum Condensate ◽  
Yang Mills ◽  
Mass Gap

Structure of Nonlocal Vacuum Condensate of Quarks

2003 ◽  
Vol 20 (12) ◽  
pp. 2137-2139 ◽  
Author(s):  
Zhou Li-Juan ◽  
Ma Wei-Xing
Keyword(s):  
Vacuum Condensate

A MORE EXACT THEORY OF RELATIVISTIC PHASE TRANSITIONS OF THE EARLY UNIVERSE

1995 ◽  
Vol 10 (09) ◽  
pp. 1343-1356 ◽  
Author(s):  
G.M. VERESHKOV ◽  
V.V. BURDYUZHA
Keyword(s):  
Phase Transitions ◽  
Heterogeneous Systems ◽  
Vacuum Condensate ◽  
Thermodynamical Equilibrium ◽  
Physical Content ◽  
The Many ◽  
The Given ◽  
Higgs Fields ◽  
Relativistic Phase ◽  
Local Thermodynamical Equilibrium

This paper examines the thermodynamics of relativistic phase transitions in which the heterogeneity of the system (the vacuum condensate, scalar and vector particles) is considered evident. The given system does not have a united functional of state which is common to both low-symmetric and high-symmetric phases. The theory acquires the necessary physical content after the introduction of additional parameters of order identified with the parameters of the energetic spectrum (effective masses of particles), The many-parameter thermodynamics of relativistic phase transitions in heterogeneous systems changes the current conceptions about the character of these transitions and about the properties of the system near the critical point. For T>Tcrit the system of Higgs fields has no thermodynamical equilibrium states and it can evolve under stochastic laws only. For T<Tcrit the stochastic regime of evolution begins to relax to the local thermodynamical equilibrium regime.

Vacuum condensate in (2+1)-dimensional gauge theories

1991 ◽  
Vol 44 (2) ◽  
pp. 464-472 ◽  
Author(s):  
Howard D. Trottier
Keyword(s):  
Gauge Theories ◽  
Vacuum Condensate
Sign in / Sign up

Export Citation Format

Share Document