"Quantumness" versus "classicality" of quantum states and quantum protocols

被引：1

作者：

Brodutch, Aharon ^{[1
,2
]}

Groisman, Berry ^{[3
,4
]}

Kenigsberg, Dan ^{[5
]}

Mor, Tal ^{[5
]}

机构：

[1] Univ Toronto, Ctr Quantum Informat & Quantum Control, Dept Phys, Toronto, ON, Canada

[2] Univ Toronto, Edward S Rogers Sr Dept Elect & Comp Engn, Toronto, ON, Canada

[3] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge, England

[4] Univ Cambridge, Sidney Sussex Coll, Cambridge, England

[5] Technion, Dept Comp Sci, IL-32000 Haifa, Israel

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2018年 / 16卷 / 02期

关键词：

Quantum information; quantum correlations; quantumness; classicality;

D O I：

10.1142/S0219749918500144

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

Entanglement is one of the pillars of quantum mechanics and quantum information processing, and as a result, the quantumness of nonentangled states has typically been overlooked and unrecognized until the last decade. We give a robust definition for the classicality versus quantumness of a single multipartite quantum state, a set of states, and a protocol using quantum states. We show a variety of nonentangled (separable) states that exhibit interesting quantum properties, and we explore the "zoo" of separable states; several interesting subclasses are defined based on the diagonalizing bases of the states, and their nonclassical behavior is investigated.

引用

页数：16