Thermal quantum correlations in a two-dimensional spin star model

被引：28
|
作者：
Haddadi, Saeed [1 ,2 ]
Pourkarimi, Mohammad Reza [3 ]
Akhound, Ahmad [2 ]
Ghominejad, Mehrdad [1 ]
机构：
[1] Semnan Univ, Fac Phys, POB 35195-363, Semnan, Iran
[2] Payame Noor Univ, Dept Phys, POB 19395-3697, Tehran, Iran
[3] Farsi Univ Kazerun, Dept Phys, Kazerun, Iran
来源：
MODERN PHYSICS LETTERS A | 2019年 / 34卷 / 22期
关键词：
Quantum correlations; spin star model; concurrence; quantum discord; MULTIPARTITE ENTANGLEMENT; SQUEEZING MODEL; DISCORD; BIPARTITE; DYNAMICS; SYSTEM;
D O I：
10.1142/S021773231950175X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this paper, we study the thermal evolution of three types of quantum correlations under the homogeneous and inhomogeneous spin star Hamiltonian. It is shown that quantum discord (QD) is more stable than the other measures in the thermal regime, but concurrence is more efficient when the Hamiltonian parameters are employed. However, all quantum correlations can reach their maximum, if the inhomogeneous parameter raises. Quantum correlations can be enhanced by a weak external magnetic field and strong coupling parameter. But they vanish in the case of a strong magnetic field, weak coupling parameter, and high temperatures.
引用
收藏
页数：15
相关论文
共 50 条
  • [41] Spin diffusion and spin conductivity in the two-dimensional Hubbard model
    Ulaga, Martin
    Mravlje, Jernej
    Kokalj, Jure
    PHYSICAL REVIEW B, 2021, 103 (15)
  • [42] Spin-Orbit Splitting in Semiconductor Quantum Dots with a Two-Dimensional Ring Model
    Feng Jun-Sheng
    Liu Zheng
    CHINESE PHYSICS LETTERS, 2009, 26 (08)
  • [43] NUMERICAL STUDY OF A QUANTUM-DIFFUSIVE SPIN MODEL FOR TWO-DIMENSIONAL ELECTRON GASES
    Barletti, Luigi
    Mehats, Florian
    Negulescu, Claudia
    Possanner, Stefan
    COMMUNICATIONS IN MATHEMATICAL SCIENCES, 2015, 13 (06) : 1347 - 1378
  • [44] Spin-orbit splitting in semiconductor quantum dots with a two-dimensional ring model
    Department of Physics, Hefei Teachers College, Hefei 230031, China
    不详
    Chin. Phys. Lett., 2009, 8
  • [45] Spin transport in a Rashba-coupled two-dimensional quantum ring: An analytical model
    Gumber, Sukirti
    Bhattacherjee, Aranya B.
    Jha, Pradip Kumar
    PHYSICAL REVIEW B, 2018, 98 (20)
  • [46] Scaling function for the spin correlation length in the two-dimensional quantum nonlinear sigma model
    Hetzel, RE
    Sudbo, A
    PHYSICAL REVIEW B, 1997, 55 (05): : 2717 - 2720
  • [47] Two-dimensional quantum spin-1/2 Heisenberg model with competing interactions
    de Sousa, JR
    Branco, NS
    PHYSICAL REVIEW B, 2005, 72 (13)
  • [48] Magnetic excitations and spin correlations in two-dimensional percolating Ising antiferromagnets
    Iwasa, K
    Ikeda, H
    Andersen, KH
    Eccleston, RS
    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (04) : 1038 - 1042
  • [49] BOUNDARY MAGNETIZATION AND SPIN CORRELATIONS IN INHOMOGENEOUS TWO-DIMENSIONAL ISING SYSTEMS
    BURKHARDT, TW
    GUIM, I
    HILHORST, HJ
    VANLEEUWEN, JMJ
    PHYSICAL REVIEW B, 1984, 30 (03): : 1486 - 1497
  • [50] Entanglement and multipartite quantum correlations in two-dimensional XY model with Dzyaloshinskii-Moriya interaction
    Usman, M.
    Khan, Khalid
    EUROPEAN PHYSICAL JOURNAL D, 2020, 74 (09):
12345