4,360 research outputs found

    Superheavies: Theoretical incitements and predictions

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    It is well known that in fusion reactions one may get only neutron deficient superheavy nuclei located far from the island of stability. The multi-nucleon transfer reactions allow one to produce more neutron enriched new heavy nuclei but the corresponding cross sections are rather low. Neutron capture process is considered here as alternative method for production of long-lived neutron rich superheavy nuclei. Strong neutron fluxes might be provided by nuclear reactors and nuclear explosions in laboratory frame and by supernova explosions in nature. All these cases are discussed in the paper.Comment: 7 FIGURE

    Extending Hudson's theorem to mixed quantum states

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    According to Hudson's theorem, any pure quantum state with a positive Wigner function is necessarily a Gaussian state. Here, we make a step towards the extension of this theorem to mixed quantum states by finding upper and lower bounds on the degree of non-Gaussianity of states with positive Wigner functions. The bounds are expressed in the form of parametric functions relating the degree of non-Gaussianity of a state, its purity, and the purity of the Gaussian state characterized by the same covariance matrix. Although our bounds are not tight, they permit us to visualize the set of states with positive Wigner functions.Comment: 4 pages, 2 figure

    Photon losses depending on polarization mixedness

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    We introduce a quantum channel describing photon losses depending on the degree of polarization mixedness. This can be regarded as a model of quantum channel with correlated errors between discrete and continuous degrees of freedom. We consider classical information over a continuous alphabet encoded on weak coherent states as well as classical information over a discrete alphabet encoded on single photons using dual rail representation. In both cases we study the one-shot capacity of the channel and its behaviour in terms of correlation between losses and polarization mixedness

    Стратегія економічного та соціального розвитку Одеської області до 2020 року

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    -Сценарій розвитку, що передбачає реалізацію «Стратегії економічного та соціального розвитку Одеської області до 2020 року», базується на ефективному викорситанні потенціалу регіону. Scenario development, which involves implementation of "Strategy of economic and social development of the Odessa region by 2020," based on an effective vykorsytanni potential.
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