Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Sotnikov, O. M."'
We develop an approach for characterizing non-local quantum correlations in spin systems with exactly or nearly degenerate ground states. Starting with linearly independent degenerate eigenfunctions calculated with exact diagonalization we generate a
Externí odkaz:
http://arxiv.org/abs/2410.00515
The development of the quantum skyrmion concept is aimed at expanding the scope of the fundamental research and practical applications for classical topologically-protected magnetic textures, and potentially paves the way for creating new quantum tec
Externí odkaz:
http://arxiv.org/abs/2210.03922
Autor:
Sotnikov, O. M., Iakovlev, I. A., Iliasov, A. A., Katsnelson, M. I., Bagrov, A. A., Mazurenko, V. V.
Publikováno v:
npj Quantum Information 8, 41 (2022)
The rapid development of quantum computing technologies already made it possible to manipulate a collective state of several dozen of qubits. This success poses a strong demand on efficient and reliable methods for characterization and verification o
Externí odkaz:
http://arxiv.org/abs/2107.09894
Publikováno v:
Phys. Rev. B 103, 060404 (2021)
In magnetism, skyrmions correspond to classical three-dimensional spin textures characterized by a topological invariant that keeps track of the winding of the magnetization in real space, a property that cannot be easily generalized to the quantum c
Externí odkaz:
http://arxiv.org/abs/2004.13526
Skyrmions in condensed matter physics appear as classical topological spin structures. This nontrivial state can be obtained solving the corresponding micromagnetic model, where the magnetization is treated as a continuous classical vector field. Her
Externí odkaz:
http://arxiv.org/abs/1811.10823
Publikováno v:
Phys. Rev. B 99, 024430 (2019)
We propose an approach for low-dimensional visualisation and classification of complex topological magnetic structures formed in magnetic materials. Within the approach one converts a three-dimensional magnetic configuration to a vector containing th
Externí odkaz:
http://arxiv.org/abs/1810.07915
Publikováno v:
Phys. Rev. B 98, 174411 (2018)
We propose and apply simple machine learning approaches for recognition and classification of complex non-collinear magnetic structures in two-dimensional materials. The first approach is based on the implementation of the single-hidden-layer neural
Externí odkaz:
http://arxiv.org/abs/1803.06682
Publikováno v:
Phys. Rev. B 97, 184415 (2018)
We report on the stabilization of the topological bimeron excitations in confined geometries. The Monte Carlo simulations for a ferromagnet with a strong Dzyaloshinskii-Moriya interaction revealed the formation of a mixed skyrmion-bimeron phase. The
Externí odkaz:
http://arxiv.org/abs/1801.07896
Publikováno v:
Phys. Rev. B 96, 224404 (2017)
We study properties of magnetic nanoparticles adsorbed on the halloysite surface. For that a distinct magnetic Hamiltonian with random distribution of spins on a cylindrical surface was solved by using a nonequilibrium Monte Carlo method. The paramet
Externí odkaz:
http://arxiv.org/abs/1706.09213
Autor:
Sotnikov, O. M., Mazurenko, V. V.
Publikováno v:
Phys. Rev. B 94, 195107 (2016)
The method for calculating the isotropic exchange interactions in the paramagnetic phase is proposed. It is based on the mapping of the high-temperature expansion of the spin-spin correlation function calculated for the Heisenberg model onto Hubbard
Externí odkaz:
http://arxiv.org/abs/1601.03205