Comments on “Generalized Procedure for Estimating the Fractions of Nonbonded Associating Molecules and Their Derivatives in Thermodynamic Pertubation Theory”

2004 ◽  
Vol 43 (19) ◽  
pp. 6262-6262 ◽  
Author(s):  
Michael L. Michelsen
Keyword(s):  
Pertubation Theory

scholarly journals Pertubation theory for systems with strong short-ranged interactions

2007 ◽  
Vol 105 (13-14) ◽  
pp. 1803-1811 ◽  
Author(s):  
Per SillrÉn ◽  
Jean-Pierre Hansen
Keyword(s):  
Pertubation Theory

scholarly journals Pertubation theory around nonnested fermi surfaces. I. Keeping the fermi surface fixed

1996 ◽  
Vol 84 (5-6) ◽  
pp. 1209-1336 ◽  
Author(s):  
Joel Feldman ◽  
Manfred Salmhofer ◽  
Eugene Trubowitz
Keyword(s):  
Fermi Surface ◽  
Fermi Surfaces ◽  
Pertubation Theory

PIONIC HYDROGEN

2005 ◽  
Vol 20 (02n03) ◽  
pp. 349-357 ◽  
Author(s):  
◽  
DETLEV GOTTA
Keyword(s):  
Coupling Constant ◽  
S Wave ◽  
Pionic Hydrogen ◽  
Pion Nucleon ◽  
Scattering Lengths ◽  
Set Up ◽  
Paul Scherrer ◽  
S States ◽  
Precision Test ◽  
Pertubation Theory

The measurement of the pion–nucleon scattering lengths constitutes a high–precision test of the methods of Chiral Pertubation Theory (χPT), which is the low–energy approach of QCD. The πN s–wave scattering lengths and the pion–nucleon coupling constant are related to the strong–interaction shift ∊1s and width Γ1s of the s–states in the pionic hydrogen atom. ∊1s and Γ1s are determined from the measured energies and line widths of X–ray transitions to the 1s ground state when compared to the calculated electromagnetic values. A new experiment, set up at the Paul–Scherrer–Institut (PSI), has completed a first series of measurements.

Piezoelectric Polaron Effects in Regular Crystals

1964 ◽  
Vol 19 (13) ◽  
pp. 1591-1598 ◽  
Author(s):  
Helmut Gabriel
Keyword(s):  
Effective Mass ◽  
Lattice Structure ◽  
Numerical Estimate ◽  
Wave Length ◽  
Approximate Solutions ◽  
The Self ◽  
Large Wave ◽  
Self Energy ◽  
Arbitrary Lattice ◽  
Pertubation Theory

Due to the interaction of an electron with both optical and acoustical modes in piezoelectric polar crystals, modified expressions for the self-energy and effective mass of the polaron are to be expected. The lattice vibrations are considered in the limit of large wave-length and an electrostatic approach to the interaction of charges in the lattice has been used. The HAMILTONIAN for a piezoelectric crystal of arbitrary lattice structure is given. With special reference to crystals of zincblende-type, approximate solutions for the self-energy and effective mass are found by thermodynamical pertubation theory. A numerical estimate for ZnS as a particularly favourable example, shows a negligible modification of the ground-state energy, but concerning the effective mass a contribution due to acoustical phonons of more than 50% of the optical-mode term.

Sum rules and pertubation theory

1967 ◽  
Vol 51 (4) ◽  
pp. 970-979 ◽  
Author(s):  
I. G. Halliday
Keyword(s):  
Sum Rules ◽  
Pertubation Theory
Sign in / Sign up

Export Citation Format

Share Document