scholarly journals Macroscopic pairing vibrational model, self-consistent pairing coupling constant, and the fifth term of von Weizsäcker's semiempirical formula

2006 ◽  
Vol 74 (1) ◽  
Author(s):  
C. H. Dasso ◽  
M. I. Gallardo
Keyword(s):  
Coupling Constant ◽  
Self Consistent ◽  
Semiempirical Formula

scholarly journals Radiative corrections and instability of large Q-balls

2017 ◽  
Vol 32 (37) ◽  
pp. 1750198 ◽  
Author(s):  
A. V. Kovtun ◽  
E. Ya. Nugaev
Keyword(s):  
The Self ◽  
Radiative Corrections ◽  
Coupling Constant ◽  
Small Coupling ◽  
Classical Stability ◽  
Small Coupling Constant ◽  
Self Consistent ◽  
Stable Solutions ◽  
Charge Formula

We discuss stability of Q-balls interacting with fermions in theory with small coupling constant [Formula: see text]. We argue that for configurations with large global U(1)-charge [Formula: see text], the problem of classical stability becomes more subtle. For example, in model with flat direction there is maximal value of charge for stable solutions with [Formula: see text]. This result may be crucial for the self-consistent consideration of Q-ball evaporation into the fermions. We study the origin of additional instability and discuss possible ways to avoid it.

THE NONEQUILIBRIUM DESCRIPTION OF SUPERRADIANT STATE ON THE BASIS OF EXACT EVOLUTION EQUATION

1987 ◽  
Vol 01 (01) ◽  
pp. 69-88
Author(s):  
N.N. BOGOLUBOV ◽  
A.R. KAZARYAN ◽  
A.M. KURBATOV ◽  
V.N. NESKOROMNYI
Keyword(s):  
Field Approximation ◽  
Stationary States ◽  
Coupling Constant ◽  
Consistent Field ◽  
Superradiant State ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Quantum Statistical ◽  
Bose Operators ◽  
Good Agreement

The non-equilibrium quantum statistical conditions of the superradiant decay are derived in the framework of the Bogolubov method for eliminating the Bose-operators. Two time scales are introduced in order to advance the concept of quasi-stationary states that makes it possible to use the main achievements of the equilibrium description. With the self-consistent field approximation and the small value of the coupling constant the conditions are shown to be in good agreement with the recent experiments on superradiance in mixed crystals carried out by the Dusseldorf group.

Self-consistent fields without exchange for Pr3+ and Tm3+

1960 ◽  
Vol 56 (1) ◽  
pp. 41-54 ◽  
Author(s):  
E. Cicely Ridley
Keyword(s):  
Ground State ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Constant ◽  
Self Consistent

ABSTRACTSelf-consistent fields without exchange have been calculated for the ground state of Pr3+ and Tm3+. The spin-orbit coupling constant ζ(4f) is found to have the values 785 and 2742 cm−1 in Pr3+ and Tm3+, respectively. The corresponding values of are 29·4 and 77·5 Å−3. Values of the Slater integrals F2(4f, 4f), F4(4f, 4f) and F6(4f, 4f) are also given for each structure.

The thermal decomposition of ammonium perchlorate II. The kinetics of the decomposition, the effect of particle size, and discussion of results

1955 ◽  
Vol 227 (1169) ◽  
pp. 214-228 ◽  
Keyword(s):  
Thermal Decomposition ◽  
The Self ◽  
Lattice Vibrations ◽  
Coupling Constant ◽  
One Dimensional ◽  
Self Consistent ◽  
Second Order Transition ◽  
Consistent Method ◽  
Effect Of Particle Size ◽  
Kinetics Of

Fröhlich has shown that a one-dimensional metal, at absolute zero, can exhibit certain of the properties of a superconductor when the interaction between the lattice vibrations and the electrons is sufficiently strong. The self-consistent method used by him is extended to finite temperatures, and the specific heat is calculated. It is shown that the model exhibits a second-order transition at a temperature which is related to the magnitude of the coupling constant. The approximations demand a coupling constant which is much larger than that of any real metal.

On the consistency of self-consistent dimensional reduction

1986 ◽  
Vol 64 (5) ◽  
pp. 641-643 ◽  
Author(s):  
G. Kunstatter ◽  
D. J. Toms
Keyword(s):  
Dimensional Reduction ◽  
Gauge Coupling ◽  
Coupling Constant ◽  
Gauge Dependence ◽  
Loop Approximation ◽  
Self Consistent ◽  
Klein Theory ◽  
The One ◽  
Self Consistency ◽  
Kaluza Klein

Several aspects of self-consistent dimensional reduction in Kaluza–Klein theory are addressed. First, the validity of the one-loop approximation in quantum gravity with a cosmological constant is discussed. Second, a distinction is made between mathematical self-consistency and physical self-consistency. Finally, the possible gauge dependence of the physical predictions for the radius and gauge coupling constant is analyzed within the context of recent theorems concerning the gauge invariance of the one-loop gravitational effective action.

The evolution of the Kuiper belt during the formation of the outer planets

1999 ◽  
Vol 173 ◽  
pp. 37-44
Author(s):  
M.D. Melita ◽  
A. Brunini
Keyword(s):  
Kuiper Belt ◽  
Outer Planets ◽  
Self Consistent ◽  
Planetary Bodies ◽  
Mass Depletion

AbstractA self-consistent study of the formation of planetary bodies beyond the orbit of Saturn and the evolution of Kuiper disks is carried out by means of an N-body code where accretion and gravitational encounters are considered. This investigation is focused on the aggregation of massive bodies in the outer planetary region and on the consequences of such process in the corresponding cometary belt. We study the link between the bombardment of massive bodies and mass depletion and eccentricity excitation.

THEORY AND SELF-CONSISTENT MODEL OF DUST-DRIVEN WINDS

2002 ◽  
Vol 5 ◽  
pp. 65-65
Author(s):  
S. Liberatore ◽  
J.-P.J. Lafon ◽  
N. Berruyer
Keyword(s):  
Consistent Model ◽  
Self Consistent
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