Quantum correlations and quantum Fisher information of two qubits in the presence of the time-dependent coupling effect

被引：7

作者：

Raffah, Bahaaudin ^{[1
]}

Abdel-Khalek, S. ^{[2
,3
]}

Berrada, K. ^{[4
]}

Khalil, E. ^{[2
]}

Al-Hadeethi, Yas ^{[1
]}

Almalky, Nawal ^{[1
]}

Wahiddin, M. R. B. ^{[5
,6
]}

机构：

[1] King Abdulaziz Univ, Dept Phys, Fac Sci, Jeddah 21438, Saudi Arabia

[2] Sohag Univ, Fac Sci, Math Dept, Sohag 82524, Egypt

[3] Taif Univ, Fac Sci, Math Dept, At Taif 21974, Saudi Arabia

[4] Imam Mohammad Ibn Saud Islamic Univ IMSIU, Coll Sci, Dept Phys, Riyadh, Saudi Arabia

[5] Int Islamic Univ IIUM, Kulliyyah ICT, Kuala Lumpur, Malaysia

[6] USIM, Cybersecur & Syst Unit, Islamic Sci Inst, Nilai 71800, Negeri Sembilan, Malaysia

来源：

EUROPEAN PHYSICAL JOURNAL PLUS | 2020年 / 135卷 / 06期

关键词：

ENTANGLEMENT; DISCORD; SYSTEM; STATE; PAIR;

D O I：

10.1140/epjp/s13360-020-00423-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we consider two separate Jaynes-Cummings (JC) nodes with a nonidentical qubit-field system in the presence of dissipation terms. We reveal the influence of the time variation of the coupling terms on some important measures when the qubits are immersed in a vacuum. The density matrix for the two qubits initially in Bell states are obtained. The dynamical behavior of the quantum discord (QD), classical correlation (CC), qubit-qubit entanglement, and quantum Fisher information (QFI) is investigated. We explore the relationship among QD, CC, qubit-qubit entanglement, and QFI in the absence and presence of the dissipation effect during the time evolution. Furthermore, we show the main optimal conditions for obtaining a high level of correlation and coherence between the two qubits.

引用

页数：10

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