Entanglement and ground state level crossings in an extended Hubbard dimer

Authors

Robertson C. Esperanza ⋅ PH National Institute of Physics, University of the Philippines Diliman
Francis N. C. Paraan ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

The single-site entanglement entropy in the ground state of an extended Hubbard dimer is calculated in terms of intrasite and intersite interaction parameters. Entanglement vanishes in a ferromagnetic regime characterized by a degenerate spin-polarized ground state. In parameter ranges with non-zero entanglement, the ground state is a linear combination of states with spin and charge modulation.

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Issue

2016: Proceedings of the 34th Samahang Pisika ng Pilipinas Physics Conference

Physics at the front and center: Strengthening core values in physics research
18–21 August 2016, University of the Philippines Visayas, Iloilo City

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Article ID

SPP-2016-PB-20

Section

Poster Session PB

Published

2016-08-18

How to Cite

[1]

RC Esperanza and FNC Paraan, Entanglement and ground state level crossings in an extended Hubbard dimer, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-PB-20 (2016). URL: https://proceedings.spp-online.org/article/view/SPP-2016-PB-20.