Results 31 to 40 of about 5,915,931 (293)
Minkowski and Galilei/Newton Fluid Dynamics: A Geometric 3 + 1 Spacetime Perspective
Fluids, 2018 A kinetic theory of classical particles serves as a unified basis for developing a geometric 3 + 1 spacetime perspective on fluid dynamics capable of embracing both Minkowski and Galilei/Newton spacetimes. Parallel treatment of these cases on as common a
Christian Cardall
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Vacuum polarization of scalar field on Lie groups with Bi-invariant metric [PDF]
Компьютерные исследования и моделирование, 2015 We consider vacuum polarization of a scalar field on the Lie groups with a bi-invariant metric of Robertson-Walker type. Using the method of orbits we found expression for the vacuum expectation values of the energy-momentum tensor of the scalar field ...
Alexander Igorevich Breev +1 more
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Plaid-Like Spin Splitting and Chirality of Magnon Bands in Antiferromagnetic MnTe<sub>2</sub>. [PDF]
Adv Sci (Weinh)Helicity‐ and angle‐resolved Raman spectroscopy reveals chiral magnons in the non‐coplanar antiferromagnet MnTe 2. Combined with first‐principles calculations and spin‐wave theory, the results establish its altermagnetic character through circular Raman dichroism, reduced rotational symmetry, and a distinctive plaid‐like momentum‐space magnon spin ...
Wulferding D +10 more
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Energy–momentum tensor on foliations
Journal of Geometry and Physics, 2007 In this paper, we give a new lower bound for the eigenvalues of the Dirac operator on a compact spin manifold. This estimate is motivated by the fact that in its limiting case a skew-symmetric tensor (see Equation \eqref{eq:16}) appears that can be identified geometrically with the O'Neill tensor of a Riemannian flow, carrying a transversal parallel ...
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Monopole and quadrupole contributions to the angular momentum density
Physics Letters B, 2019 The energy-momentum tensor form factors contain a wealth of information about the nucleon. It is insightful to visualize this information in terms of 3D or 2D densities related by Fourier transformations to the form factors. The densities associated with
Peter Schweitzer, Kemal Tezgin
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Energy–momentum tensor for the electromagnetic field in a dielectric [PDF]
Optics Communications, 2010 The total momentum of a thermodynamically closed system is unique, as is the total energy. Nevertheless, there is continuing confusion concerning the correct form of the momentum and the energy-momentum tensor for an electromagnetic field interacting with a linear dielectric medium.
Crenshaw, Michael E., Bahder, Thomas B.
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Gauge-Invariant Localization of Infinitely Many Gravitational Energies from All Possible Auxiliary Structures [PDF]
, 2009 The problem of finding a covariant expression for the distribution and conservation of gravitational energy-momentum dates to the 1910s. A suitably covariant infinite-component localization is displayed, reflecting Bergmann's realization that there are ...
Pitts, J. Brian, J. Brian Pitts
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Einstein double field equations
European Physical Journal C: Particles and Fields, 2018 Upon treating the whole closed string massless sector as stringy graviton fields, Double Field Theory may evolve into Stringy Gravity, i.e. the stringy augmentation of General Relativity.
Stephen Angus +2 more
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On Tensorial Concomitants and the Non-Existence of a Gravitational Stress-Energy Tensor [PDF]
, 2009 Based on an analysis of what it may mean for one tensor to depend in the proper way on another, I prove that, under certain natural conditions, there can be no tensor whose interpretation could be that it represents gravitational stress-energy in general
Curiel, Erik
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On the energy-momentum tensor [PDF]
, 2021 We clarify the relation among canonical, metric and Belinfante's energy-momentum tensors for general tensor field theories. For any tensor field T, we define a new tensor field T in terms of which the Belinfante tensor is readily computed.
Gamboa Saraví, Ricardo Enrique
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