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Entanglement and Correlation Functions in 1D Extended Hubbard Model

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The maximization of quantum entanglement in correlated qubits system for optimal coulomb interaction energy is investigated. We consider a chain of N correlated fermions described by an Extended Hubbard Model parameterized by kinetic energy t, on-site Coulomb interaction energy U and nearest-neighbour Coulomb interaction energy V. Then, we attribute the quantum entanglement measure to the von Neumann entropy. The obtained results show that the quantum entanglement in half Hubbard chains is N independent for N≥ 10. Moreover, the analysis of V dependency on quantum entanglement in half Extended Hubbard chains show that the quantum entanglement reaches its maximum value for U = 2V.
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Keywords: EXTENDED HUBBARD MODEL; OFF-SITE INTERACTION; QUANTUM ENTANGLEMENT; QUBIT

Document Type: Research Article

Publication date: September 1, 2018

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  • Journal of Advanced Physics is an interdisciplinary peer-reviewed journal consolidating research activities in all experimental and theoretical aspects of advanced physics. The journal aims in publishing articles of novel and frontier physics that merit the attention and interest of the whole physics community. JAP publishes review articles, full research articles, short communications of important new scientific and technological findings in all latest research aspects of physics.
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