Results 131 to 140 of about 27,292 (170)

Invariance in elementary particle physics

Reports on Progress in Physics, 1959
An account, as non-technical as possible, is given of the invariance properties that have important applications in elementary particle physics. These can be classified in several ways. Firstly some are related to continuous groups (rotations), others to discrete groups (inversions).
Kemmer, N., Polkinghorne, J. C., Pursey, D. L.   +2 more
openaire   +2 more sources

Physics-like invariants for vision

Proceedings of the Workshop on Physics-Based Modeling in Computer Vision, 2002
Unlike geometric invariants, the invariants described here concern the physical processes that form images, involving shading, IR, radar, sonar, etc. The image formed by such a process depends on many variables in addition to the geometry, such as the characteristics of the lighting or other incident radiation, the imaging system, etc.
openaire   +1 more source

Conformal Invariance in Physics

1976
In the last decade mathematical physicists have been especially interested by the group of conformal transformations of space-time — the so-called conformal group. What are the main physical reasons for the increasing interest in such an old subject [1]?
openaire   +1 more source

Invariance Principles of Nuclear Physics

Annual Review of Nuclear Science, 1958
Space inversion (P), time reversal (T), and chargeconjugation (C) are discussed. Some mixed operations obtained by combining P, C, and T are described. A discussion of isotopic spin invariance or charge independence and other related operations is presented.
openaire   +1 more source

Invariant physical fields with gauge freedom

Physica A: Statistical Mechanics and its Applications, 1982
Abstract In the context of gauge theories, a field is made invariant to some space-time transformations if it is gauge-equivalent to its image. This note provides examples of both gauge and matter fields which obey such an invariant condition. The gauge group will be SU(2) and isotriplets of scalars and isodoublets of Dirac fields will be considered ...
Yvan Saint-Aubin, Luc Vinet, Joël Doneux   +2 more
openaire   +1 more source

Broken scale invariance in particle physics

Physics Reports, 1971
Abstract Recent theoretical efforts to understand how scale invariance is broken are reviewed in this paper. Various formulations of approximate scale invariance are considered, with emphasis on the structure of the energy-momentum tensor and the short distance behaviour of field theory.
openaire   +1 more source

On physical property tensors invariant under line groups

Acta Crystallographica Section A Foundations and Advances, 2014
The form of physical property tensors of a quasi-one-dimensional material such as a nanotube or a polymer can be determined from the point group of its symmetry group, one of aninfinitenumber of line groups. Such forms are calculated using a method based on the use of trigonometric summations.
openaire   +3 more sources

Emerging exciton physics in transition metal dichalcogenide heterobilayers

Nature Reviews Materials, 2022
Emma C Regan, Yongxin Zeng, Long Zhang
exaly  

New horizons for fundamental physics with LISA

Living Reviews in Relativity, 2022
K g Arun, Emanuele Berti, Gianfranco Bertone   +2 more
exaly  

Invariant physics

Physics Essays, 2014
openaire   +1 more source