Convertibility between two-qubit states using stochastic local quantum operations assisted by classical communication

Constant rotation of two-qubit equally entangled pure states by local quantum operations

We look for local unitary operatorsW1⊗W2 which would rotate all equally entangled two-qubit pure states by the same but arbitrary amount. It is shown that all two-qubit maximally entangled states can be rotated through the same but arbitrary amount by local unitary operators. But there is no local unitary operator which can rotate all equally entangled non-maximally entangled states by the same...

Discrimination of two-qubit unitaries via local operations and classical communication.

Distinguishability is a fundamental and operational measure generally connected to information applications. In quantum information theory, from the postulates of quantum mechanics it often has an intrinsic limitation, which then dictates and also characterises capabilities of related information tasks. In this work, we consider discrimination between bipartite two-qubit unitary transformations...

Multipartite Entanglement under Stochastic Local Operations and Classical Communication

Stochastic local operations and classical communication (SLOCC), also called local filtering operations, are a convenient, useful set of quantum operations in grasping essential properties of entanglement. We give a quick overview about the characteristics of multipartite entanglement in terms of SLOCC, illustrating the 2-qubit and the rest (2 × 2 × n) quantum system. This not only includes cel...

Quantum secret sharing via local operations and classical communication

We investigate the distinguishability of orthogonal multipartite entangled states in d-qudit system by restricted local operations and classical communication. According to these properties, we propose a standard (2, n)-threshold quantum secret sharing scheme (called LOCC-QSS scheme), which solves the open question in [Rahaman et al., Phys. Rev. A, 91, 022330 (2015)]. On the other hand, we find...

Necessary Condition for Local Quantum Operations and Classical Communication with Extensive Violation by Separable Operations