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Off-diagonal long-range order in Little's model

✍ Scribed by A. Wulf; J. F. Fernández


Publisher
Springer US
Year
1972
Tongue
English
Weight
295 KB
Volume
7
Category
Article
ISSN
0022-2291

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Off-diagonal long-range order in the BCS
✍ Marvin E Rensink 📂 Article 📅 1967 🏛 Elsevier Science 🌐 English ⚖ 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