Results 361 to 370 of about 1,905,400 (400)
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Symmetry breaking in twisted double bilayer graphene
, 2020The flat bands that appear in some twisted van der Waals heterostructures provide a setting in which strong interactions between electrons lead to a variety of correlated phases 1 – 20 .
Minhao He +7 more
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Breaking symmetry in SMCs [PDF]
Nature Structural & Molecular Biology, 2013 SMC (structural maintenance of chromosomes) protein complexes act in chromosome processing in all domains of life. In this issue, a study of the prokaryotic SMC complex Smc–ScpAB reveals an unanticipated asymmetry despite Smc forming a symmetric homodimer.
Amy L. Upton, David J. Sherratt
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Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
, 1982The treatment of first-order phase transitions for standard grand unified theories is shown to break down for models with radiatively induced spontaneous symmetry breaking.
A. Albrecht, P. Steinhardt
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Supersolid symmetry breaking from compressional oscillations in a dipolar quantum gas
Nature, 2019Supersolids are exotic materials combining the frictionless flow of a superfluid with the crystal-like periodic density modulation of a solid. The supersolid phase of matter was predicted 50 years ago1–3 for solid helium4–8.
L. Tanzi +8 more
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2008
Scarcely any term connects art and science more closely than symmetry. This was already a theme in ancient times, as is found in Vitruvius, for example. On the beach of an unknown island, a shipwrecked traveler finds neatly arranged geometric figures. Can he conclude from this that there is an intelligent creator (perhaps even a god)?
Otto E. Rössler +9 more
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Scarcely any term connects art and science more closely than symmetry. This was already a theme in ancient times, as is found in Vitruvius, for example. On the beach of an unknown island, a shipwrecked traveler finds neatly arranged geometric figures. Can he conclude from this that there is an intelligent creator (perhaps even a god)?
Otto E. Rössler +9 more
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On the lorentz-symmetry breaking
Il Nuovo Cimento A, 1988Moving 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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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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Symmetries and Breaking of Symmetries
2016Symmetries 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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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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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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Breaking of Accidental Symmetries
2006Fermion 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.
C. Becchi, Giovanni Ridolfi
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