Mixedness, Coherence and Entanglement in a Family of Three-Qubit States

被引：6

作者：

Kalaga, Joanna K. ^{[1
]}

Leonski, Wieslaw ^{[1
]}

Szczesniak, Radoslaw ^{[2
]}

Perina, Jan, Jr. ^{[3
]}

机构：

[1] Univ Zielona Gora, Inst Phys, Quantum Opt & Engn Div, Prof Z Szafrana 4a, PL-65516 Zielona Gora, Poland

[2] Czestochowa Tech Univ, Div Phys, Ave Armii Krajowej 19, PL-42200 Czestochowa, Poland

[3] Palacky Univ, Joint Lab Opt Palacky Univ & Inst Phys CAS, Fac Sci, 17 Listopadu 12, Olomouc 77146, Czech Republic

来源：

ENTROPY | 2022年 / 24卷 / 03期

关键词：

quantum entanglement; linear entropy; coherence; purity of states; concurrence; three-qubit systems; UNKNOWN STATE; QUANTUM STATE; PHYS; LETT; W-STATES; TELEPORTATION; COMMUNICATION; SCHEME; CAVITY;

D O I：

10.3390/e24030324

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a family of states describing three-qubit systems. We derived formulas showing the relations between linear entropy and measures of coherence such as degree of coherence, first- and second-order correlation functions. We show that qubit-qubit states are strongly entangled when linear entropy reaches some range of values. For such states, we derived the conditions determining boundary values of linear entropy parametrized by measures of coherence.

引用

页数：15

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