scholarly journals Static quark-antiquark pair free energy and screening masses: continuum results at the QCD physical point

2016 ◽  
Author(s):  
Attila Pasztor
Keyword(s):  
Free Energy ◽  
Physical Point ◽  
Static Quark

scholarly journals Flux tubes in Nf = 2 + 1 QCD with external magnetic fields

2018 ◽  
Vol 175 ◽  
pp. 12008 ◽  
Author(s):  
Claudio Bonati ◽  
Salvatore Calì ◽  
Massimo D’Elia ◽  
Michele Mesiti ◽  
Francesco Negro ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Tree Level ◽  
Magnetic Field Direction ◽  
Physical Point ◽  
Flux Tubes ◽  
Gauge Action ◽  
Uniform External Magnetic Field ◽  
Static Quark ◽  
The Magnetic Field

We study the behavior of the confining flux tube in Nf = 2 + 1 QCD at the physical point, discretized with the stout smearing improved staggered quark action and the tree level Symazik gauge action. We discuss how it depends on a uniform external magnetic field, showing how it displays anisotropies with respect to the magnetic field direction. Moreover, we compare the observed anisotropy pattern with that of the static quark-antiquark (QQ̅) potential we obtained in [1, 2].

scholarly journals Single quark entropy and the Polyakov loop

2016 ◽  
Vol 31 (35) ◽  
pp. 1630040 ◽  
Author(s):  
Johannes Heinrich Weber
Keyword(s):  
Free Energy ◽  
Quantum Chromodynamics ◽  
Wide Temperature Range ◽  
Weak Coupling ◽  
Quantitative Result ◽  
Polyakov Loop ◽  
Crossover Region ◽  
Quark Masses ◽  
Coupling Behavior ◽  
Static Quark

We study Quantum Chromodynamics (QCD) with 2 + 1 flavors with almost physical quark masses using the highly improved staggered quark action (HISQ). We calculate the Polyakov loop in a wide temperature range, obtain the free energy and the entropy of a single static quark and discuss the QCD crossover region in detail. We show that the entropy has a peak close to the chiral crossover and consider the consequences for the deconfinement aspects of the crossover phenomena. We study the renormalized Polyakov loop susceptibilities and place them into the context of the crossover. We also obtain a quantitative result for the onset of weak-coupling behavior at high temperatures.

The Interaction between Carbon Black and Sulfur during Vulcanization

1959 ◽  
Vol 32 (1) ◽  
pp. 118-122
Author(s):  
G. A. Blokh ◽  
A. G. Yaroshevich
Keyword(s):  
Free Energy ◽  
Carbon Black ◽  
High Strength ◽  
Point Of View ◽  
Physical Point ◽  
Space Lattice ◽  
Carbon Particles ◽  
Continuous Mass ◽  
Filler Particles ◽  
Increased Strength

Abstract The mechanism of the reinforcement of rubber by carbon black has until recently been interpreted from the physical point of view. According to the researches of P. A. Rebinder and coworkers the extent of the interaction between the filler and the rubber is given by the decrease in the free energy of the system resulting from the wetting of 1 cm2 of the surface of the filler particles by rubber. The rubber is bound to the surface of the carbon black particles through adsorption and forms around these particles an extended film which is characterized by high strength; in this state the rubber is referred to as “bound” or film-like rubber. In systems in which such adsorbed rubber is present there appears on the surface of the filler particles an effect which resembles a kind of “crystallization” of rubber which results in a strengthening of the interaction between individual chains and hence in increased strength of the rubber. According to Kusov, at optimum filling of the rubber with carbon black the mixture constitutes a continuous mass—a molecular space lattice with carbon particles situated in its nodes.

scholarly journals Static quark-antiquark free energy and the running coupling at finite temperature

2004 ◽  
Vol 70 (7) ◽  
Author(s):  
O. Kaczmarek ◽  
F. Karsch ◽  
F. Zantow ◽  
P. Petreczky
Keyword(s):  
Free Energy ◽  
Finite Temperature ◽  
Running Coupling ◽  
Static Quark

scholarly journals Dependence of the static quark free energy on μB and the crossover temperature of Nf=2+1 QCD

2019 ◽  
Vol 100 (5) ◽  
Author(s):  
Massimo D’Elia ◽  
Francesco Negro ◽  
Andrea Rucci ◽  
Francesco Sanfilippo
Keyword(s):  
Free Energy ◽  
Crossover Temperature ◽  
Static Quark

scholarly journals Information processing in biological molecular machines

2020 ◽  
Author(s):  
M. Kurzynski ◽  
P. Chelminiak
Keyword(s):  
Free Energy ◽  
Time Course ◽  
Stochastic Dynamics ◽  
Short Term Memory ◽  
Molecular Machines ◽  
Complex Model ◽  
Point Of View ◽  
Physical Point ◽  
Protein Motors ◽  
Organized Assemblies

ABSTRACTBiological molecular machines are enzymes that simultaneously catalyze two processes, one donating free energy and second accepting it. Recent studies show that most native protein enzymes have a rich stochastic dynamics of conformational transitions which often manifests in fluctuating rates of the catalyzed processes and the presence of short-term memory resulting from the preference of certain conformations. For arbitrarily complex stochastic dynamics of protein machines, we proved the generalized fluctuation theorem predicting the possibility of reducing free energy dissipation at the expense of creating some information stored in memory. That this may be the case has been shown by interpreting results of computer simulations for a complex model network of stochastic transitions. The subject of the analysis was the time course of the catalyzed processes expressed by sequences of jumps at random moments of time. Since similar signals can be registered in the observation of real systems, all theses of the paper are open to experimental verification.STATEMENT OF SIGNIFICANCEThe transient utilization of memory for storing information turns out to be crucial for the movement of protein motors and the reason for most protein machines to operate as dimers or higher organized assemblies. From a broader physical point of view, the division of free energy into the operation and organization energies is worth emphasizing. Information can be assigned a physical meaning of a change in the value of both these functions of state.

Encultured minds, not error reduction minds

2020 ◽  
Vol 43 ◽  
Author(s):  
Robert Mirski ◽  
Mark H. Bickhard ◽  
David Eck ◽  
Arkadiusz Gut
Keyword(s):  
Free Energy ◽  
Error Reduction ◽  
Energy Principle ◽  
Free Energy Principle ◽  
Current Article

Abstract There are serious theoretical problems with the free-energy principle model, which are shown in the current article. We discuss the proposed model's inability to account for culturally emergent normativities, and point out the foundational issues that we claim this inability stems from.

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