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Extremal entanglement and mixedness in continuous variable systems
TLDR
The concept of average logarithmic negativity is introduced, showing that it allows a reliable quantitative estimate of continuo us variable entanglement by direct measurements of global and marginal generalized p-entropies.
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Entanglement in continuous-variable systems: recent advances and current perspectives
We review the theory of continuous-variable entanglement with special emphasis on foundational aspects, conceptual structures and mathematical methods. Much attention is devoted to the discussion of…
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LETTER TO THE EDITOR: Symplectic invariants, entropic measures and correlations of Gaussian states
We present a derivation of the Von Neumann entropy and mutual information of arbitrary two-mode Gaussian states, based on the explicit determination of the symplectic eigenvalues of a generic…
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Multiphoton quantum optics and quantum state engineering
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Optimal estimation of losses at the ultimate quantum limit with non-Gaussian states
We address the estimation of the loss parameter of a bosonic channel probed by arbitrary signals. Unlike the optimal Gaussian probes, which can attain the ultimate bound on precision asymptotically…
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Gaussian measures of entanglement versus negativities: Ordering of two-mode Gaussian states
TLDR
Gaussian measures and negativities are definitely inequivalent measures of entanglement on nonsymmetric two-mode Gaussian states, even when restricted to a class of extremal states, and some strong evidence is provided suggesting that they are as well bounded from above as they are shown to be.
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Unitarily localizable entanglement of gaussian states
We consider generic (mxn)-mode bipartitions of continuous-variable systems, and study the associated bisymmetric multimode Gaussian states. They are defined as (m+n)-mode Gaussian states invariant…
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Mixtures of Bosonic and Fermionic Atoms in Optical Lattices
We discuss the theory of mixtures of bosonic and fermionic atoms in periodic potentials at zero temperature. We derive a general Bose-Fermi Hubbard Hamiltonian in a one-dimensional optical lattice…
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Monogamy inequality for distributed gaussian entanglement.
We show that for all n-mode Gaussian states of continuous variable systems, the entanglement shared among n parties exhibits the fundamental monogamy property. The monogamy inequality is proven by…
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Geometric measures of quantum correlations: characterization, quantification, and comparison by distances and operations
We investigate and compare three distinguished geometric measures of bipartite quantum correlations that have been recently introduced in the literature: the geometric discord, the…
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