Results 21 to 30 of about 674,523 (227)

Weyl conformal geometry vs Weyl anomaly

open access: yesJournal of High Energy Physics, 2023
Weyl conformal geometry is a gauge theory of scale invariance that naturally brings together the Standard Model (SM) and Einstein gravity. The SM embedding in this geometry is possible without new degrees of freedom beyond SM and Weyl geometry, while ...
D. M. Ghilencea
doaj   +1 more source

Geometries with the Second Poincaré Symmetry [PDF]

open access: yesCommunications in Theoretical Physics, 2012
The second Poincar kinematical group serves as one of new ones in addition to the known possible kinematics. The geometries with the second Poincar symmetry is presented and their properties are analyzed. On the geometries, the new mechanics based on the principle of relativity with two universal constants $(c,l)$ can be established.
Huang, Chao-Guang   +4 more
openaire   +2 more sources

Comparing crystal structures with symmetry and geometry

open access: yesnpj Computational Materials, 2021
Measuring the similarity between two arbitrary crystal structures is a common challenge in crystallography and materials science. Although there are an infinite number of ways to mathematically relate two crystal structures, only a few are physically ...
John C. Thomas   +2 more
doaj   +1 more source

Non-metric geometry as the origin of mass in gauge theories of scale invariance

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We discuss gauge theories of scale invariance beyond the Standard Model (SM) and Einstein gravity. A consequence of gauging this symmetry is that their underlying 4D geometry is non-metric ( $$\nabla _\mu g_{\alpha \beta }\!\not =\!0$$ ∇ μ g α β ≠ 0 ...
D. M. Ghilencea
doaj   +1 more source

Global Geometry of Bayesian Statistics

open access: yesEntropy, 2020
In the previous work of the author, a non-trivial symmetry of the relative entropy in the information geometry of normal distributions was discovered. The same symmetry also appears in the symplectic/contact geometry of Hilbert modular cusps. Further, it
Atsuhide Mori
doaj   +1 more source

Topologically protected optical signal processing using parity–time-symmetric oscillation quenching

open access: yesNanophotonics, 2021
The concept of topology is universally observed in various physical objects when the objects can be described by geometric structures. Although a representative example is the knotted geometry of wavefunctions in reciprocal space for quantum Hall family ...
Yu Sunkyu, Piao Xianji, Park Namkyoo
doaj   +1 more source

Symmetry as a Representation of Intuitive Geometry?

open access: yes, 2022
Recognition of geometrical patterns seems to be an important aspect of human intelligence. Geometric pattern recognition is used in many intelligence tests, including Dehaene's odd-one-out test of Core Geometry (CG)) based on intuitive geometrical concepts (Dehaene et al., 2006).
Xu, Wangcheng   +2 more
openaire   +3 more sources

Trineodymium(III) pentairon(III) dodecaoxide, Nd3Fe5O12

open access: yesActa Crystallographica Section E, 2009
The title compound, Nd3Fe5O12 (NdIG), has an iron garnet structure. One of the Fe atoms is coordinated by six O atoms in a slightly distorted octahedral geometry and has overline{3} site symmetry.
Takashi Komori   +4 more
doaj   +1 more source

Corner Symmetry and Quantum Geometry

open access: yes, 2023
By virtue of the Noether theorems, the vast gauge redundancy of general relativity provides us with a rich algebra of boundary charges that generate physical symmetries. These charges are located at codimension-2 entangling surfaces called corners.
Freidel, Laurent   +2 more
openaire   +3 more sources

Symmetry in Complex Contact Manifolds

open access: yesHittite Journal of Science and Engineering, 2017
W ,κ µ-spaces with κ< are locally -symmetric.e define complex locally -symmetric spaces.
Belgin Korkmaz
doaj   +1 more source

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