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2008 | 113 | 1 | 417-420
Article title

Entanglement Properties and Phase Diagram of the Two-Orbital Atomic Hubbard Model

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Abstracts
EN
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.
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EN
Contributors
author
  • Dipartimento di Fisica "E.R. Caianiello" - Unita CNISM di Salerno, Universita degli Studi di Salerno, 84081 Baronissi (SA), Italy
author
  • Dipartimento di Fisica "E.R. Caianiello" - Unita CNISM di Salerno, Universita degli Studi di Salerno, 84081 Baronissi (SA), Italy
author
  • Dipartimento di Fisica "E.R. Caianiello" - Unita CNISM di Salerno, Universita degli Studi di Salerno, 84081 Baronissi (SA), Italy
author
  • School of Physics, University of Hyderabad, Hyderabad 500 134, India
References
  • 1. V.I. Anisimov, I.A. Nekrasov, D.E. Kondakov, T.M. Rice, M. Sigist, Eur. Phys. J. B 25, 191 (2002)
  • 2. L. de Medici, A. Georges, S. Biermann, Phys. Rev. B 72, 205124 (2005)
  • 3. M. Ferrero, F. Becca, M. Fabrizio, M. Capone, Phys. Rev. B 72, 205126 (2005)
  • 4. A. Avella, F. Mancini, S. Odashina, G. Scelza, Physica C 460-462 , 1068 (2007)
  • 5. F. Mancini, A. Avella, Adv. Phys. 53, 537 (2004)
  • 6. K. Eckert, J. Schliemann, D. Bruss, M. Lewenstein, Ann. Phys. 299, 88 (2002)
  • 7. P. Zanardi, Phys. Rev. A 65, 042101 (2002)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1102kz
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