Results 291 to 300 of about 70,277 (313)

Geometric symmetry breaking

Physical Review Letters, 1985
The spontaneous symmetry breaking in higher-dimensional unified field theories is discussed in a general setting. A purely geometric symmetry-breaking mechanism involving no free parameters is presented, in which the symmetry is broken by the higher-dimensional metric through Einstein's equation.
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Symmetry Breaking

2006
Symmetry occurs in many problems in aritifical intelligence. For example, in the n-queens problem, the chessboard can be rotated 90°. As a second example, several machines in a factory might have the same capacity. In a production schedule, we might therefore be able to swap the jobs on machines with the same capacity.
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Symmetry and symmetry breaking

2023
This 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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Symmetries and symmetry breaking

2017
Abstract 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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Symmetries and Breaking of Symmetries

2016
Symmetries help to reduce complexity of calculations. A familiar example is the use of spherical polar coordinates in calculating integrals of quantities which are spherical symmetric. If one manages to find coordinates fitting to symmetries, some of them disappear from the invariant functions and this reduces the calculation task drastically. The same
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On the lorentz-symmetry breaking

Il Nuovo Cimento A, 1988
Moving from a theory that allows for the break of the Lorentz symmetry in the tangent space-time within a Riemannian geometric framework, this paper looks for the admissible values of the parameters that measure the break. These values are explicitly worked out in some special cases and it is shown that all of them must be zero.
TARTAGLIA, Angelo, ZHANG YUAN ZHONG
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Breaking of Accidental Symmetries

2006
Fermion mass terms are forbidden by the gauge symmetry of the standard model. Indeed, a Dirac mass term for a fermion field ψ $$ - m\not \bar v\not v = - m\left( {\not \bar v_L \not v_R + \not \bar v_R \not v_L } \right) $$ (9.1) is not invariant under a chiral transformation, i.e.
Carlo M. Becchi, Giovanni Ridolfi
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Conditional Symmetry Breaking

2005
We introduce the study of Conditional symmetry breaking in constraint programming. This arises in a sub-problem of a constraint satisfaction problem, where the sub-problem satisfies some condition under which additional symetries hold. Conditional symmetry can cause redundancy in a systematic search for solutions. Breaking this symmetry is an important
Ian P. Gent, Tom W. Kelsey, Steve Linton, Iain McDonald, Ian Miguel, Barbara M. Smith   +5 more
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Symmetry and symmetry-breaking in multiagent behavior

Artificial Life and Robotics, 1998
This paper presents some results about properties of the spatial behavior of systems consisting of many artificial agents (robots). The general goal is to understand how the complexity of group behavior is related to individual behavior, and how differences arise and can be grounded.
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Spontaneous and directed symmetry breaking in the formation of chiral nanocrystals

Proceedings of the National Academy of Sciences of the United States of America, 2019
Uri Hananel, Assaf Ben-Moshe, Haim Diamant   +2 more
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