Results 31 to 40 of about 37,266 (256)
Charge and the topology of spacetime [PDF]
Classical and Quantum Gravity, 1999 A new class of electrically charged wormholes is described in which the outer two sphere is not spanned by a compact coorientable hypersurface. These wormholes can therefore display net electric charge from the source free Maxwell's equation. This extends the work of Sorkin on non-space orientable manifolds, to spacetimes which do not admit a time ...
Diemer, Tammo , Hadley, Mark J.
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Spiral phase plate with multiple singularity centers
Компьютерная оптика, 2020 We investigate a multispiral phase plate (MSPP) with multiple centers of phase singularity arbitrarily located in the MSPP plane. Equations to describe the topological charge of an optical vortex in the initial plane immediately behind the MSPP and ...
V.V. Kotlyar +3 more
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Thermal Simulations, Open Boundary Conditions and Switches
EPJ Web of Conferences, 2018 SU(N) gauge theories on compact spaces have a non-trivial vacuum structure characterized by a countable set of topological sectors and their topological charge. In lattice simulations, every topological sector needs to be explored a number of times which
Burnier Yannis +3 more
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Probing Topological Charge of Discrete Vortices
Physical Review Applied, 2023 Discrete vortex, formed by a one-dimensional (1D) ring array of lasers, contains high output power as compared to a conventional continuous vortex, therefore, has attracted considerable interest due to widespread applications in various fields. We present a method for probing the magnitude and sign of the topological charge (TC) of an unknown discrete ...
Vasu Dev, Vishwa Pal
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Topology of Born-Infeld AdS black holes in 4D novel Einstein-Gauss-Bonnet gravity
Physics Letters B, 2022 The topological classification of critical points of black holes in 4D Einstein-Gauss-Bonnet gravity coupled to Born-Infeld theory is investigated. Considered independently, Born-infeld corrections to the Einstein action alter the topological charge of ...
Pavan Kumar Yerra +1 more
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Charges and Electromagnetic Radiation as Topological Excitations [PDF]
Advances in High Energy Physics, 2017 We discuss a model with stable topological solitons in Minkowski space with only three degrees of freedom, the rotational angles of a spatial Dreibein. This model has four types of solitons differing in two topological quantum numbers which we identify with electric charge and spin.
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Wilson Fermions and the topological charge on the lattice [PDF]
Nuclear Physics B, 1986 We investigate the realization on the lattice of the relation between the chiral properties of the fermions and the topological properties of the gauge field. A lattice definition of the topological charge density via the U(1) Adler-Bardeen anomaly is analysed with the help of given configurations of nontrivial topology and for 2-dimensional quenched ...
Karsch, Frithjof +2 more
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Tunable topological charge vortex microlaser [PDF]
Science, 2020 Optical vortices on demand Light has several degrees of freedom (wavelength, polarization, pulse length, and so on) that can be used to encode information. A light beam or pulse can also be structured to have the property of orbital angular momentum, becoming a vortex.
Zhifeng Zhang +11 more
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Fractional skyrme lines in ferroelectric barium titanate
Physical Review ResearchWe predict a topological defect in perfectly screened ferroelectric barium titanate which we call a skyrme line. These are linelike objects characterized by skyrmionic topological charge.
Chris Halcrow, Egor Babaev
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Charge as a Topological Property in Three-Dimensional Time
Reports in Advances of Physical SciencesThis paper presents electric charge as a topological property emerging naturally from the three-dimensional temporal structure previously established.
Gunther Kletetschka
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