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Long-range orders in the doubly degenerate Hubbard model

✍ Scribed by J. Mizia


Publisher
Elsevier Science
Year
1980
Tongue
English
Weight
264 KB
Volume
33
Category
Article
ISSN
0038-1098

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Off-diagonal long-range order in the BCS
✍ Marvin E Rensink πŸ“‚ Article πŸ“… 1967 πŸ› Elsevier Science 🌐 English βš– 339 KB

The two-particle reduced density matrix p2 is analyzed for a system of electrons described by the BCS ground state. The existence of off-diagonal longrange order in pZ is demonstrated by explicit calculation of its matrix elements. It is shown that pz has one eigenvalue proportional to N where N is