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Necessary and sufficient quantum information characterization of Einstein-Podolsky-Rosen steering.
TLDR
It is proved that, for any bipartite steerable state, there are instances of the quantum subchannel discrimination problem for which this state allows a correct discrimination with strictly higher probability than in the absence of entanglement, even when measurements are restricted to local measurements aided by one-way communication.
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Improved entropic uncertainty relations and information exclusion relations
TLDR
This work provides a more stringent formulation of both the uncertainty principle and the information exclusion principle, with direct applications for, e.g., the security analysis of quantum key distribution, entanglement estimation, and quantum communication.
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No-local-broadcasting theorem for multipartite quantum correlations.
We prove that the correlations present in a multipartite quantum state have an operational quantum character even if the state is unentangled, as long as it does not simply encode a multipartite…
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Robustness of Coherence: An Operational and Observable Measure of Quantum Coherence.
TLDR
The robustness of coherence is defined and proven to be a full monotone in the context of the recently introduced resource theories of quantum coherence, and the measure is shown to be observable.
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Problem with geometric discord
We argue that the geometric discord introduced in [B. Dakic, V. Vedral, and C. Brukner, Phys. Rev. Lett. 105, 190502 (2010)] is not a good measure for the quantumness of correlations, as it can…
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Relative entropy of entanglement and restricted measurements.
  • M. Piani
  • Computer Science, Physics
    Physical review letters
  • 17 April 2009
TLDR
It is proved that the standard regularized entropy of entanglement is strictly positive for all multipartite entangled states, which implies that the asymptotic creation of a multipartites entangled state by means of local operations and classical communication always requires the consumption of a nonlocal resource at a strictly positive rate.
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Robustness of asymmetry and coherence of quantum states
Quantum states may exhibit asymmetry with respect to the action of a given group. Such an asymmetry of states can be considered as a resource in applications such as quantum metrology, and it is a…
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Operational interpretations of quantum discord
Quantum discord quantifies nonclassical correlations beyond the standard classification of quantum states into entangled and unentangled. Although it has received considerable attention, it still…
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All nonclassical correlations can be activated into distillable entanglement.
TLDR
A protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement, emphasizing the key role of state mixedness in maximizing non classicality.
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A Few Steps More Towards NPT Bound Entanglement
TLDR
The particular state, known to be 1-copy nondistillable and supposed to be bound entangled, is considered, and the problem of its two-copy distillability, which boils down to show that maximal overlap of some projector with Schmidt rank two states does not exceed 1/2 is studied.
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