Персона: Воскресенский, Дмитрий Николаевич
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Воскресенский
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Дмитрий Николаевич
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- ПубликацияТолько метаданныеHybrid equation of state with pasta phases, and third family of compact stars(2019) Yasutake, N.; Ayriyan, A.; Grigorian, H.; Maruyama, T.; Maslov, K.; Blaschke, D.; Voskresensky, D. N.; Воскресенский, Дмитрий НиколаевичThe effect of pasta phases on the quark-hadron phase transition is investigated for a set of relativistic mean-field equations of state for both hadron and quark matter. The results of the full numerical solution with pasta phases are compared with those of an interpolating construction used in previous works, for which we demonstrate an adequate description of the numerical results. A one-to-one mapping of the free parameter of the construction to the physical surface tension of the quark-hadron interface is obtained for which a fit formula is given. For each pair of quark and hadron matter models the critical value of the surface tension is determined, above which the phase transition becomes close to the Maxwell construction. This result agrees well with earlier theoretical estimates. The study is extended to neutron star matter in beta equilibrium with electrons and muons and is applied to investigate the effect of pasta phases on the structure of hybrid compact stars and the robustness of a possible third family solution.
- ПубликацияОткрытый доступNonequilibrium Pion Distribution within the Zubarev Approach(2020) Blaschke, D.; Ropke, G.; Voskresensky, D. N.; Morozov, V. G.; Воскресенский, Дмитрий НиколаевичWe discuss how the non-equilibrium process of pion production within the Zubarev approach of the non-equilibrium statistical operator leads to a theoretical foundation for the appearance of a non-equilibrium pion chemical potential for the pion distribution function for which there is experimental evidence in experiments at the CERN LHC.
- ПубликацияОткрытый доступQuark-hadron pasta in neutron stars(2019) Yasutake, N.; Ayriyan, A.; Grigorian, H.; Maruyama, T.; Maslov, K.; Blaschke, D.; Voskresensky, D.; Воскресенский, Дмитрий Николаевич© 2019 Author(s).Pasta structures are studied for the quark-hadron phase transition. We find the useful correlation, which can provide the physical limits of the surface energy between quark and hadron matter, namely "σc-Pc relation". Our hadron model is based on the relativistic mean field theory with a general formulation, which can reproduce the traditional Walecka-type model, non-linear Walecka-type model, etc. without changing the Lagrangian. The quark model is the string-flip model with the quasi-particle approximation and excluded volume effects. We also find that the analytic estimation derived from the liner-approximation is consistent with the numerical results. It means that we can roughly estimate the physical limit of the surface tension without any special numerical techniques, when we prepare uniform quark matter and hadron matter. We expect that the above behaviors can be help to reduce numerical costs to make huge EOS tables for astrophysical simulations, and would be a useful index to understand the quark-hadron phase transition.