We compute the entanglement cost of several families of bipartite mixed states, including arbitrary mixtures of two Bell states. This is achieved by developing a technique that allows us to ascertain the additivity of the entanglement of formation for any state supported on specific subspaces. As a...
To solve this problem, alternative definition of concurrence of mixed states is introduced in present work. In particular, concurrence of mixed states is determined as an average of pure states concurrences. Averaging is carried out over the quantum ensemble, corresponding to all possible realization...
We consider entanglement-assisted remote quantum state manipulation of bipartite mixed states. Several aspects are addressed: we present a class of mixed states of rank two that can be transformed into another class of mixed states under entanglement-assisted local operations with classical communication...
Dark states of atomic ensembles: properties and preparation It can be used for the source of energy for nano-devices; the space of dark states is decoherence free and can serve as the carrier for the fault ... YI Ozhigov - 《Proceedings of the Spie》 被引量: 3发表: 2016年 加载更多来...
This leads to twonkinds of upper bounds on the number of locally distinguishable orthogonal mixed states. The first one dependsnonly on pure-state entanglement within the supports of the states and therefore may be easy to compute in manyninstances. The second bound is optimal in the sense ...
Graph states1,2,3—multipartite entangled states that can be represented by mathematical graphs—are important resources for quantum computation4, quantum error correction3, studies of multiparticle entanglement1 and fundamental tests of non-locality5,6,
Our results explain that the time-dependent ionic–phononic quantum system is observed at a higher degree of entanglement for three optimum times; these are, respectively, 16.5, 110, and 220 fs. These optimum entangled states can be modified for the structure of black holes in a probabilistic ...
This first measurement may be thought of as a state preparation for the remaining particles. In this paper, we examine how the duration of the first measurement effects the state of the unmeasured subsystem. The state of the unmeasured subsytem will be a pure or mixed state depending on ...
Entanglement Cost of Bipartite Mixed States We compute the entanglement cost of several families of bipartite mixed states, including arbitrary mixtures of two Bell states. This is achieved by develo... G Vidal,W Dür,JI Cirac - 《Physical Review Letters》 被引量: 178发表: 2002年 Observable Me...
(QE).QEisoneofthemostprofoundfeaturesofquan— turnmechanicsandhasbeenvieweda8akeYresourcefor QIP.1l一引Inpractice.duetodecoherenceandotherinter. actionswiththeenvironment,itisveryhardtoproduce andmaintainentanglementofpurestates.Thus,under— standingandquantifyingentanglementofmixedstates ...