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Publications Influence

Induced vacuum current and magnetic field in the background of a cosmic string

- Yu.A. Sitenko, N. Vlasii
- Physics
- 2 September 2009

Vacuum polarization effects in the cosmic string background are considered. We find that a current is induced in the vacuum of the quantized massive scalar field and that the current circulates… Expand

22 1- PDF

Electronic properties of graphene with a topological defect

- Yu.A. Sitenko, N. Vlasii
- Physics, Mathematics
- 19 June 2007

Abstract Various types of topological defects in graphene are considered in the framework of the continuum model for long-wavelength electronic excitations, which is based on the Dirac–Weyl equation.… Expand

55- PDF

On the possible induced charge on a graphitic nanocone at finite temperature

- Yu.A. Sitenko, N. Vlasii
- Physics
- 11 November 2007

Electronic excitations in a graphitic monolayer (graphene) in the long-wavelength approximation are characterized by the linear dispersion law, representing a unique example of the really… Expand

7- PDF

Fractionalization of angular momentum at finite temperature around a magnetic vortex

- Yu.A. Sitenko, N. Vlasii
- Physics
- 30 August 2006

Abstract Ambiguities in the definition of angular momentum of a quantum-mechanical particle in the presence of a magnetic vortex are reviewed. We show that the long-standing problem of the adequate… Expand

Induced vacuum energy-momentum tensor in the background of a cosmic string

- Yu.A. Sitenko, N. Vlasii
- Physics
- 4 October 2011

A massive scalar field is quantized in the background of a cosmic string which is generalized to a static flux-carrying codimension-2 brane in the locally flat multidimensional spacetime. We find… Expand

10- PDF

On the effective lagrangian in spinor electrodynamics with added violation of Lorentz and CPT-symmetries

- Yu.A. Sitenko, K.Yu. Rulik
- Physics
- 1 December 2002

Abstract. We consider quantum electrodynamics with additional coupling of spinor fields to the space-time independent axial vector violating both Lorentz and CPT-symmetries. The Fock-Schwinger… Expand

13- PDF

Vacuum polarization effects in the cosmic string background

- Yu.A. Sitenko, N. Vlasii
- Physics
- 4 June 2009

A charged scalar field is quantized in the background of a cosmic string which is generalized to a (d - 2)-brane in locally flat (d + 1)-dimensional space-time. The induced vacuum current is found to… Expand

Optical theorem for Aharonov–Bohm scattering

- Yu.A. Sitenko, N. Vlasii
- Physics, Mathematics
- 28 March 2011

Quantum-mechanical scattering off a magnetic vortex is considered, and the optical theorem is derived. The vortex core is assumed to be impermeable to scattered particles, and its transverse size is… Expand

5- PDF

Nonlocality, Self-Adjointness and Theta-Vacuum in Quantum Field Theory in Spaces with Nontrivial Topology

- Yu.A. Sitenko
- Physics
- 20 February 1997

We consider an analogue of the Aharonov-Bohm effect in quantum field theory: the fermionic vacuum attains nontrivial quantum numbers in the background of a magnetic vortex even in the case when the… Expand

Electromagnetic Field in de Sitter Expanding Universe: Majorana--Oppenheimer Formalism, Exact Solutions in non-Static Coordinates

- O. Veko, N. Vlasii, Yu.A. Sitenko, E. Ovsiyuk, V. Red'kov
- Physics, Mathematics
- 30 October 2014

Tetrad-based generalized complex formalism by Majorana--Oppenheimer is applied to treat electromagnetic field in extending de Sitter Universe in on-static spherically-symmetric coordinates. With the… Expand