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 …

Quantum states that possess negative conditional von Neumann entropy provide quantum
advantage in several information-theoretic protocols including superdense coding, state …

Entanglement in multipartite systems is a key resource for quantum information and
communication protocols, making its verification in complex systems a necessity. Because …

Quantum states are the key mathematical objects in quantum mechanics, and entanglement
lies at the heart of the nascent fields of quantum information processing and computation …

Any two-qubit state can be represented geometrically by a steering ellipsoid inside the Bloch
sphere. We extend this approach to represent any block-positive two-qubit operator B. We …

Entanglement is the crucial resource for different quantum information processing tasks.
While conventional studies focus on the entanglement of bipartite or multipartite quantum …

Quantum states that possess negative conditional von Neumann entropy (quantum
conditional entropy) provide quantum advantage in several information-theoretic protocols …