Электронный каталог

Статья

Papoyan, Vl.V.
Logarithmic Negativity of the 1D Antiferromagnetic Spin-1 Heisenberg Model with Single-Ion Anisotropy / Vl.V.Papoyan, G.Gori, V.V.Papoyan Jr., [et al.] // Physica E [Electronic resource]. – 2024. – Vol. 158. – P. 115899. – URL: https://doi.org/10.1016/j.physe.2024.115899. – Bibliogr.: 52.

We study the 1D antiferromagnetic spin-1 Heisenberg XXX model with external magnetic field 𝐵 and single-ion anisotropy 𝐷 on finite chains. We determine the nearest and non-nearest neighbor logarithmic entanglement 𝐿𝑁. Our main result is the disappearance of 𝐿𝑁 both for nearest and non-nearest neighbor (next-nearest and next-next-nearest) sites at zero temperature and for low-temperature states. Such disappearance occurs at a critical value of 𝐵 and 𝐷. The resulting phase diagram for the behavior of LN is discussed in the 𝐵 − 𝐷 plane, including a separating line – ending in a triple point – where the energy density is independent on the size. Finally, results for 𝐿𝑁 at finite temperature as a function of 𝐵 and 𝐷 are presented and commented.



Спец.(статьи,препринты) = С 325 - Статистическая физика и термодинамика
ОИЯИ = ОИЯИ (JINR)2024
Бюллетени = 23/024