Entanglement and Correlation Functions in 1D Extended Hubbard Model
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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Document Type: Research Article
Publication date: September 1, 2018
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