Avella, A. ; Mancini, F. ; Scelza, G. (2008) Entanglement properties and phase diagram of the two orbital Hubbard model Acta Physica Polonica, 113 (1). pp. 417-420. ISSN 0587-4254
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Abstract
We study the two-orbital Hubbard model in the limit of vanishing kinetic energy. The phase diagram in the V-J plane, with V and J denoting the interorbital hybridization and exchange coupling respectively, at half filling is obtained. A singlet(dimer)-triplet transition is found for a critical value of the ratio V/J. The entropy of formation, both in the mode and in the particle pictures, presents a jump at the same critical line in conformity with the suggested relation between criticality and entanglement.
Item Type: | Article |
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Source: | Copyright of this article belongs to Jagellonian University. |
ID Code: | 89820 |
Deposited On: | 02 May 2012 13:12 |
Last Modified: | 19 May 2016 04:15 |
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