Results 341 to 350 of about 2,681,911 (377)
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Anti–parity-time symmetry in diffusive systems
Science, 2019Making heat stand still Dissipative oscillating systems (waves) can be described mathematically in terms of non-Hermitian physics. When parity-time symmetric systems have dissipative components, the interplay between gain and loss can lead to unusual and
Ying Li +10 more
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Symmetry and symmetry breaking
2023This entry begins with a brief description of the historical roots and emergence of the concept of symmetry that is at work in modern science. It then turns to the application of this concept to physics, distinguishing between two different uses of symmetry: symmetry principles versus symmetry arguments.
K. Brading, CASTELLANI, ELENA, N. Teh
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, 2003
Summary. A fairly general procedure is studied to perturb a multivariate density satisfying a weak form of multivariate symmetry, and to generate a whole set of non‐symmetric densities.
A. Azzalini, A. Capitanio
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Summary. A fairly general procedure is studied to perturb a multivariate density satisfying a weak form of multivariate symmetry, and to generate a whole set of non‐symmetric densities.
A. Azzalini, A. Capitanio
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Non-Hermitian physics and PT symmetry
Nature Physics, 2018R. El-Ganainy +5 more
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Perception, 2009
The notions of symmetry group and camouflage are explained, and a technique is introduced to visually camouflage symmetry groups in natural textures. Two experiments were carried out to test discriminability of symmetry groups p1, p2, pm, and pg in 4-oddity and 5AFC designs with different or same texture per set of stimulus pictures, respectively.
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The notions of symmetry group and camouflage are explained, and a technique is introduced to visually camouflage symmetry groups in natural textures. Two experiments were carried out to test discriminability of symmetry groups p1, p2, pm, and pg in 4-oddity and 5AFC designs with different or same texture per set of stimulus pictures, respectively.
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Symmetries II: Discrete Symmetries
2011This is probably the most technical chapter of this book. Discrete symmetries play a fundamental role in modern particle physics and cosmology. We have delayed their study until now to be able to develop all the tools required to explore some or their fascinating consequences.
Luis Álvarez-Gaumé +1 more
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Parity–time symmetry and exceptional points in photonics
Nature Materials, 2019Ş. Özdemir +3 more
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Symmetry, symmetry transformations and symmetry conditions
2020Shuguang Li, Elena Sitnikova
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Symmetries and symmetry breaking
2017Abstract The spontaneous breaking of symmetries (SSB) is discussed for global symmetries and Goldstones theorem is derived. The renormalisation of theories with SSB is studied using the effective potential. Then SSB is applied to the Abelian Higgs model, both on the classical and quantum level.
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