Effective Hamiltonian approach to the bound state: Positronium hyperfine structure

1997 ◽  
Vol 56 (1) ◽  
pp. 297-304 ◽  
Author(s):  
Krzysztof Pachucki
Keyword(s):  
Hyperfine Structure ◽  
Bound State ◽  
Effective Hamiltonian ◽  
Hamiltonian Approach

scholarly journals Effective Hamiltonian approach to hyperon beta decay with final-state baryon polarization

1999 ◽  
Vol 60 (11) ◽  
Author(s):  
S. Bright ◽  
R. Winston ◽  
E. C. Swallow ◽  
A. Alavi-Harati
Keyword(s):  
Beta Decay ◽  
Effective Hamiltonian ◽  
Hamiltonian Approach ◽  
Final State ◽  
State Baryon

POSSIBLE COEXISTENCE OF ANTIFERROMAGNETISM AND SUPERCONDUCTIVITY IN THE HUBBARD MODEL

1988 ◽  
Vol 01 (09n10) ◽  
pp. 341-347 ◽  
Author(s):  
SHEN JUE-LIAN ◽  
SU ZHAO-BIN ◽  
DONG JIN-MING ◽  
YU LU
Keyword(s):  
Hubbard Model ◽  
High Temperature Superconductivity ◽  
Mean Field ◽  
Field Approximation ◽  
Mean Field Approximation ◽  
Antiferromagnetic Order ◽  
Effective Hamiltonian ◽  
Hamiltonian Approach ◽  
Theoretical Approaches ◽  
The Mean

The Hubbard model in the nearly half-filled case was studied in the mean field approximation using the effective Hamiltonian approach. Both antiferromagnetic order parameter and condensation of singlet pairs were considered. In certain parameter range the coexistence of antiferromagnetism and superconductivity is energetically favorable. Relations to the high temperature superconductivity and other theoretical approaches are also discussed.

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