Published in

Instytut Podstaw Informatyki, Acta Physica Polonica A, 1(113), p. 417-420, 2008

DOI: 10.12693/aphyspola.113.417

Links

Tools

Export citation

Search in Google Scholar

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

Journal article published in 2008 by A. Avella ORCID, F. Mancini, G. Scelza, S. Chaturvedi
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Red circle
Preprint: archiving forbidden
Red circle
Postprint: archiving forbidden
Green circle
Published version: archiving allowed
Upload
Policy details
Data provided by SHERPA/RoMEO

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 picture, presents a jump as the same critical line in conformity with the suggested relation between criticality and entanglement. ; Comment: 5 pages, 1 figure