STRIPES IN DOPED ANTIFERROMAGNETS: BOND-CENTERED VERSUS SITE-CENTERED

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3783-3790 ◽  
Author(s):  
MARC G. ZACHER ◽  
ROBERT EDER ◽  
ENRICO ARRIGONI ◽  
WERNER HANKE
Keyword(s):  
Perturbation Theory ◽  
Green’S Function ◽  
Green's Function ◽  
Single Particle ◽  
Short Distance ◽  
Long Distance ◽  
Distance Effects ◽  
Cluster A

The single-particle Green's function for a striped t–J model is calculated using cluster a perturbation theory, where short-distance effects are accounted for by exact cluster diagonalization and long-distance effects by perturbation (in the hopping). Both site-centered and bond-centered stripe scenarios have been studied. The data for site-centered stripes quantitatively reproduce salient (ARPES-) features.

scholarly journals NONFACTORIZABLE CONTRIBUTIONS IN NONLEPTONIC WEAK INTERACTIONS OF K MESONS

2001 ◽  
Vol 16 (09) ◽  
pp. 1605-1630 ◽  
Author(s):  
K. TERASAKI
Keyword(s):  
Short Distance ◽  
Weak Interactions ◽  
Mass Difference ◽  
Long Distance ◽  
Field Algebra ◽  
K Meson ◽  
Distance Effects ◽  
Intermediate States ◽  
Meson Pole ◽  
Existing Data

K→ππ, KL-KS mass difference (Δ mK) and KL→γγ(*) are studied systematically by decomposing their amplitude into a sum of factorizable and nonfactorizable ones. The former is calculated by using the naive factorization while the latter is assumed to be controlled by hadron dynamics. Nonfactorizable amplitudes for the K→ππ decays which are estimated by using a hard pion technique dominates the |ΔI| = ½ amplitude. It is seen that the naively factorized short distance term dominates ΔmK as usual since contributions of pseudoscalar-meson poles and ππ intermediate states as the nonfactorizable long distance effects interfere destructively with each other. The K*-meson pole survives in the KL→γγ decay and plays an important role in the present perspective in contrast with the existing theories which are restricted by the theory of field algebra. The form factor for the Dalitz decays of KL and their rates are compared with the existing data.

scholarly journals Elementary band representations for the single-particle Green's function of interacting topological insulators

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Dominik Lessnich ◽  
Stephen M. Winter ◽  
Mikel Iraola ◽  
Maia G. Vergniory ◽  
Roser Valentí
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Single Particle ◽  
Topological Insulators ◽  
Elementary Band

scholarly journals Single-particle resonant states with Green’s function method

2020 ◽  
Vol 44 (8) ◽  
pp. 084105
Author(s):  
Cheng Chen ◽  
Zhipan Li ◽  
Yuxiao Li ◽  
Tingting Sun
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Single Particle ◽  
Function Method ◽  
Green’S Function Method ◽  
Resonant States
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