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Two-and three-body correlation in dilute Hubbard systems

✍ Scribed by C. Wang; O. Navarro; R. Oviedo-Roa; L.A. Pérez

Book ID
103940695
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
157 KB
Volume
199-200
Category
Article
ISSN
0921-4526

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✦ Synopsis

In order to find an exact solution for the Hubbard systems with few electrons, we have developed a new method, which consists of mapping the original many-body problem onto a tight-binding one in a higher-dimensional space. Applying this mapping method to a chain, a square lattice and a triangular one, the pairing problem of two electrons and two holes with anti-parallel spins has been analyzed by looking at the binding energy and the coherence length for attractive interactions. Finally, some results of the ihree-body correlation are also reported.

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Correlation diagram for rigid and nonrig
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✍ Michael E. Kellman; R.Stephen Berry 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 399 KB

We consider the rektion between energy level patterns of rigid structures and those of systems in which theparticle motions are uncorrclated. Defining an ideal model system of the non-rigid limit for N identical particles, we exhibit the correlation diagram connecting this limit to an ideal rigid s