Channel discrimination power of bipartite quantum states
نویسندگان
چکیده
منابع مشابه
Entanglement of formation of bipartite quantum states.
We give an explicit tight lower bound for the entanglement of formation for arbitrary bipartite mixed states by using the convex hull construction of a certain function. This is achieved by revealing a novel connection among the entanglement of formation, the well-known Peres-Horodecki, and realignment criteria. The bound gives a quite simple and efficiently computable way to evaluate quantitat...
متن کاملQuantum Nonlocality of Arbitrary Dimensional Bipartite States
We study the nonlocality of arbitrary dimensional bipartite quantum states. By computing the maximal violation of a set of multi-setting Bell inequalities, an analytical and computable lower bound has been derived for general two-qubit states. This bound gives the necessary condition that a two-qubit state admits no local hidden variable models. The lower bound is shown to be better than that f...
متن کامل11 Discrimination of Quantum States
The problem of discriminating among given nonorthogonal quantum states is underlying many of the schemes that have been suggested for quantum communication and quantum computing. However, quantum mechanics puts severe limitations on our ability to determine the state of a quantum system. In particular, nonorthogonal states cannot be discriminated perfectly, even if they are known, and various s...
متن کاملBipartite discrimination of independently prepared quantum states as a counterexample of a parallel repetition conjecture
For distinguishing quantum states sampled from a fixed ensemble, the gap in bipartite and singleparty distinguishability can be interpreted as a nonlocality of the ensemble. In this paper, we consider bipartite state discrimination in a composite system consisting of N subsystems, where each subsystem is shared between two parties and the state of each subsystem is randomly sampled from a parti...
متن کاملEntanglement splitting of pure bipartite quantum states
where % i is a density matrix for the nth subsystem, and the positive weights pi obey ∑ i pi = 1. Otherwise the system is called entangled – a property that exists only for quantum states. Several features of entanglement have been studied so far, e.g. how to concentrate entanglement of several pairs into more entangled fewer pairs (distillation or purification [1,2]) or how to transfer entangl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2018
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.97.032334