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Information × Registration Number 0213U001398, 0112U005081 , R & D reports Title Application of string theory and field theory methods in study of nonlinear phenomena in low-dimensional systems popup.stage_title Head Zagorodny Anatoly Glibovych, Registration Date 01-02-2013 Organization Bogolyubov Institute for Theoretical Physics of National Academy of Sciences of Ukraine popup.description2 Study of nonlinear phenomena is one of the main directions in condensed matter physics, plasma physics, cosmology and astrophysics, elementary particle physics. Common to these studies is the use non-perturbative methods of quantum field theory, string theory and integrable classical and quantum systems. When the project has developed new approaches to the application of these methods and developed new methods for the study of nonlinear phenomena in low-dimensional systems, in particular, was found dynamic polarization for two-layer graphene in the random phase approximation that yielded the dispersive relation for plasmon modes, and was investigated how different gaps in the spectrum of two-layer graphene, which determine the quantum Hall, quantum spin Hall, layer antiferromagnet states, quantum valley Hall states, affecting on the optical and spectroscopic properties mahnetooptychni double-layer graphene. It was investigated statistical description of particle motion in incompressible isotropic Gaussian random field velocities using formulated analytical model and method deсоrrelative trajectories. Them also it was investigated the properties of the local density of states of electronic excitations in graphene in superposition of Aharonov-Bohm potential and constant magnetic field and the impact of finite size effects on the magnetic vortex Aharonov-Bohm. It was suggested a new mechanism for generating high velocities of pulsars which is connected with the possibility of the existence of axial currents in the central regions of neutron stars with strong magnetic fields due to the origin in this case nonzero chiral shift parameter in the normal ground state. It was suggested a new approach to study the evolution of cosmological perturbations of scalar type in the model of the universe on the branes. Product Description popup.authors Іоргов Микола Зіновійович Візнюк Олександр Володимирович Горбар Едуард Володимирович Гусинін Валерій Павлович Засенко Володимир Іванович Ситенко Юрій Олексійович Черняк Олександр Миколайович Шадура Віталій Микоайович Шарапов Сергій Генадійович Штанов Юрій Володимирович popup.nrat_date 2020-04-02 Close