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Improved decoupling procedure for green functions

✍ Scribed by Jan Linderberg; Yngve Öhrn

Book ID
103010458
Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
203 KB
Volume
1
Category
Article
ISSN
0009-2614

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✦ Synopsis

Equations of motion for the single particle propagator are decoupled by an operator expansion technique. An application to the Hubbard Hamiltonian for the hydrogen molecule or ethylene n-electron ground state gives the exact solution.

📜 SIMILAR VOLUMES

Moment-conserving decoupling of green fu
Moment-conserving decoupling of green functions via pade approximants
✍ O. Goscinski; B. Lukman 📂 Article 📅 1970 🏛 Elsevier Science 🌐 English ⚖ 301 KB

A generalization of tho Pad6 approximaot tcchniquc obtained by inner projections leads to npproximate Green functions whose spoctmi densities satisfy :I certain number of frequency moments. This approsch contains decoupling schemes previously given and their explicit rcprosentation in terms of the m