Photon Pairing and the Strong-Coupling Phase of Massive Quantum Electrodynamics

1989 ◽  
Vol 63 (13) ◽  
pp. 1442-1442
Author(s):  
R. Fukuda
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Coupling Phase

GAUGE INVARIANT STUDY OF THE STRONG COUPLING PHASE OF MASSLESS QUANTUM ELECTRODYNAMICS

1990 ◽  
Vol 05 (09) ◽  
pp. 1789-1800 ◽  
Author(s):  
M. UKITA ◽  
M. KOMACHIYA ◽  
R. FUKUDA
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Chiral Symmetry Breaking ◽  
Renormalization Scheme ◽  
Gauge Parameter ◽  
Coupling Constant ◽  
Critical Coupling ◽  
Gauge Invariant ◽  
Coupling Phase ◽  
Massless Quantum

The strong coupling phase of massless Quantum Electrodynamics is studied in a gauge invariant way. The formalism is given in which the order parameter of the chiral symmetry breaking is calculated through the vacuum polarization diagrams. Applying this method, the critical coupling constant is shown to exist that is independent of the gauge parameter but is now dependent on the ratio of the two kinds of cutoff. Implication of this new parameter on the renormalization scheme in the strong coupling phase is discussed.

OBSERVABLE CONSEQUENCES OF THE STRONG COUPLING PHASE OF QED HYPOTHESIZED NEAR THE SURFACE OF LARGE-Z NUCLEI

1990 ◽  
Vol 05 (05) ◽  
pp. 309-314 ◽  
Author(s):  
M. INOUE ◽  
T. MUTA ◽  
J. SAITO ◽  
H.-L. YU
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
External Disturbance ◽  
Surface Region ◽  
Heavy Ion ◽  
Coincidence Measurement ◽  
Heavy Nuclei ◽  
Coupling Phase ◽  
Electron Positron ◽  
Large Atomic Number

We discuss observable effects of the assumption that the strong coupling phase of quantum electrodynamics is realized in the surface region of heavy nuclei with large atomic number Z under a suitable external disturbance. We present some comments on anomalous peaks in electron-positron systems observed in heavy ion reactions and on effects expected in electron and positron scatterings off large-Z nuclei. We propose some experiments to test our assumption: (1) coincidence measurement of e+e− and γγ signals from the decays of large-Z nuclei, and (2) spectroscopy of large-Z muonic atoms.

PHOTON PAIRING AND THE STRONG COUPLING PHASE OF MASSIVE QUANTUM ELECTRODYNAMICS COOPER EQUATION

1990 ◽  
Vol 05 (06) ◽  
pp. 381-390 ◽  
Author(s):  
T. INAGAKI ◽  
M. KOMACHIYA ◽  
R. FUKUDA
Keyword(s):  
Fine Structure ◽  
External Field ◽  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Structure Constant ◽  
Critical Value ◽  
Low Energy ◽  
Fine Structure Constant ◽  
Coupling Phase ◽  
Effective Lagrangian

Through the Cooper equation of the photon pairing, the instability of the normal vacuum of the Quantum Electrodynamics with the massive electron is studied. Using the low energy effective Lagrangian, the normal vacuum is shown to be unstable against the condensation of the photon pairs above the critical value of the fine structure constant. These agree with the previous results obtained by the Bethe-Salpeter equation. The presence of the weak electric external field enhances the instability thus lowering the critical value. This can be a basis for the explanation of the anomalous GSI e+e− events.

THE RELATION BETWEEN CHIRAL SYMMETRY SPONTANEOUSLY BREAKING AND CONFINEMENT IN QED

2001 ◽  
Vol 16 (12) ◽  
pp. 2253-2266
Author(s):  
KOU SU-PENG
Keyword(s):  
Strong Coupling ◽  
Chiral Symmetry ◽  
Dimensional Reduction ◽  
Weak Coupling ◽  
Coupling Phase ◽  
Fermion Pairs ◽  
Two Phases

In this paper, we use Parisi and Sourlas dimensional reduction to show that QED has two phases, the strong coupling phase and weak coupling phase. Because chiral symmetry is spontaneously broken, particles with fractional charges are confined in the strong coupling phase by the condensation of topological configurations, and particles with integer charges are screened by fermion pairs.

scholarly journals Atoms and molecules in cavities, from weak to strong coupling in quantum-electrodynamics (QED) chemistry

2017 ◽  
Vol 114 (12) ◽  
pp. 3026-3034 ◽  
Author(s):  
Johannes Flick ◽  
Michael Ruggenthaler ◽  
Heiko Appel ◽  
Angel Rubio
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Atoms And Molecules

Strong coupling phase in lattice gauge theories at large dimension

1979 ◽  
Vol 161 (2-3) ◽  
pp. 397-416 ◽  
Author(s):  
J.-M. Drouffe ◽  
G. Parisi ◽  
N. Sourlas
Keyword(s):  
Strong Coupling ◽  
Gauge Theories ◽  
Large Dimension ◽  
Coupling Phase ◽  
Lattice Gauge ◽  
Lattice Gauge Theories

scholarly journals Phases of a strongly coupled four-fermion theory

2018 ◽  
Vol 175 ◽  
pp. 03004 ◽  
Author(s):  
David Schaich ◽  
Simon Catterall
Keyword(s):  
Strong Coupling ◽  
Weak Coupling ◽  
Strongly Coupled ◽  
Coupling Phase ◽  
Long Range Correlations ◽  
Mass Gap ◽  
Narrow Region ◽  
Lattice Field ◽  
Lattice Symmetry ◽  
Lattice Fermion

We present ongoing investigations of a four-dimensional lattice field theory with four massless reduced staggered fermions coupled through an SU(4)-invariant fourfermion interaction. As in previous studies of four-fermion and Higgs–Yukawa models with different lattice fermion discretizations, we observe a strong-coupling phase in which the system develops a mass gap without breaking any lattice symmetry. This symmetric strong-coupling phase is separated from the symmetric weak-coupling phase by a narrow region of four-fermi coupling in which the system exhibits long-range correlations.

Continuum strong-coupling expansion for quantum electrodynamics

1981 ◽  
Vol 24 (10) ◽  
pp. 2706-2723 ◽  
Author(s):  
Fred Cooper ◽  
Richard Kenway
Keyword(s):  
Strong Coupling ◽  
Quantum Electrodynamics ◽  
Strong Coupling Expansion
Sign in / Sign up

Export Citation Format

Share Document