Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.020402
Keywords
-
Categories
Funding
- 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
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available