期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.020402
关键词
-
资金
- EPSRC [EP/K022512/1]
- Royal Commission for the Exhibition of 1851
- Leverhulme Trust
- Government of Canada through NSERC
- Province of Ontario through MRI
- EPSRC [EP/K022512/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K022512/1] Funding Source: researchfish
The quantum steering ellipsoid of a two-qubit state is the set of Bloch vectors that Bob can collapse Alice's qubit to, considering all possible measurements on his qubit. We provide an elementary construction of the ellipsoid for arbitrary states, calculate its volume, and explain how this geometric representation can be made faithful. The representation provides a range of new results, and uncovers new features, such as the existence of incomplete steering in separable states. We show that entanglement can be analyzed in terms of three geometric features of the ellipsoid and prove that a state is separable if and only if it obeys a nested tetrahedron condition.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据