Quantum Entanglements in mixed-spin XY systems

Pan-Pan Zhang, Jie Wang, Yu-Liang Xu, Chun-Yang Wang and Xiang-Mu Kong

Physica A: Statistical Mechanics and its Applications, 2021, vol. 566, issue C

Abstract: In order to study the entanglement properties of mixed-spin systems, taking Negativity as a measure of quantum entanglement, it is studied in (1/2, 1) mixed-spin XY systems. It is found that both ferromagnetic or antiferromagnetic cases, the Negativity of systems decreases with increasing temperature and finally changes to zero smoothly. An interesting phenomenon is that the temperature T0 (defined as the characteristic temperature) at which the Negativity becomes zero is low when the value of the crystal field parameter D is large. The relation between the thermal entanglement(T→0) and ground-state entanglement with two and three sites is studied, respectively. It is also found that the mixed-state entanglement and the thermal entanglement at T→0 can be well corresponding in both systems studied; but the Negativity in pure state and that in mixed state are quite different in the system with two sites.

Keywords: Thermal entanglement; Ground-state entanglement; Mixed-spin XY model; Negativity (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378437120309419
Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:566:y:2021:i:c:s0378437120309419

DOI: 10.1016/j.physa.2020.125643

Access Statistics for this article

Physica A: Statistical Mechanics and its Applications is currently edited by K. A. Dawson, J. O. Indekeu, H.E. Stanley and C. Tsallis

More articles in Physica A: Statistical Mechanics and its Applications from Elsevier
Bibliographic data for series maintained by Catherine Liu ().