Goldberger-treiman constants of dynamical near-Goldstone modes

1980 ◽  
Author(s):  
M. A. B. Bég
Keyword(s):  
Goldstone Modes

scholarly journals Effective Lagrangian for Nambu-Goldstone modes in nonequilibrium open systems

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
Masaru Hongo ◽  
Suro Kim ◽  
Toshifumi Noumi ◽  
Atsuhisa Ota
Keyword(s):  
Open Systems ◽  
Effective Lagrangian ◽  
Goldstone Modes

scholarly journals Asymptotic symmetries and celestial CFT

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Laura Donnay ◽  
Sabrina Pasterski ◽  
Andrea Puhm
Keyword(s):  
Principal Series ◽  
Finite Energy ◽  
Continuous Series ◽  
Asymptotic Symmetry ◽  
Null Infinity ◽  
Conformal Dimension ◽  
Contour Integrals ◽  
Celestial Sphere ◽  
Goldstone Modes ◽  
Asymptotic Symmetries

Abstract We provide a unified treatment of conformally soft Goldstone modes which arise when spin-one or spin-two conformal primary wavefunctions become pure gauge for certain integer values of the conformal dimension ∆. This effort lands us at the crossroads of two ongoing debates about what the appropriate conformal basis for celestial CFT is and what the asymptotic symmetry group of Einstein gravity at null infinity should be. Finite energy wavefunctions are captured by the principal continuous series ∆ ∈ 1 + iℝ and form a complete basis. We show that conformal primaries with analytically continued conformal dimension can be understood as certain contour integrals on the principal series. This clarifies how conformally soft Goldstone modes fit in but do not augment this basis. Conformally soft gravitons of dimension two and zero which are related by a shadow transform are shown to generate superrotations and non-meromorphic diffeomorphisms of the celestial sphere which we refer to as shadow superrotations. This dovetails the Virasoro and Diff(S2) asymptotic symmetry proposals and puts on equal footing the discussion of their associated soft charges, which correspond to the stress tensor and its shadow in the two-dimensional celestial CFT.

scholarly journals Nambu–Goldstone modes and diffuse deformations in elastic shells

Soft Matter ◽  
2013 ◽  
Vol 9 (34) ◽  
pp. 8246 ◽  
Author(s):  
Christian D. Santangelo
Keyword(s):  
Elastic Shells ◽  
Goldstone Modes

scholarly journals Manifestation of structural Higgs and Goldstone modes in the hexagonal manganites

2020 ◽  
Vol 102 (1) ◽  
Author(s):  
Quintin N. Meier ◽  
Adrien Stucky ◽  
Jeremie Teyssier ◽  
Sinéad M. Griffin ◽  
Dirk van der Marel ◽  
...  
Keyword(s):  
Hexagonal Manganites ◽  
Goldstone Modes

scholarly journals Goldstone modes and Clebsch–Gordan coefficients

2018 ◽  
Vol 937 ◽  
pp. 214-225
Author(s):  
Xian-Zheng Bai ◽  
Deshan Yang ◽  
Da-Xin Zhang
Keyword(s):  
Goldstone Modes

scholarly journals Wave Vector Difference of Magnetic Bragg Reflections and Low Energy Magnetic Excitations in Charge-stripe Ordered La2NiO4.11

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
P. G. Freeman ◽  
S. R. Giblin ◽  
M. Skoulatos ◽  
R. A. Mole ◽  
D. Prabhakaran
Keyword(s):  
Wave Vector ◽  
Magnetic Order ◽  
Volume Fraction ◽  
Transverse Field ◽  
Low Energy ◽  
Zero Energy ◽  
Magnetic Excitations ◽  
Vector Difference ◽  
Charge Stripe ◽  
Goldstone Modes

Abstract We report on the magnetism of charge-stripe ordered La2NiO4.11±0.01 by neutron scattering and μSR. On going towards zero energy transfer there is an observed wave vector offset in the centring of the magnetic excitations and magnetic Bragg reflections, meaning the excitations cannot be described as Goldstone modes of the magnetic order. Weak transverse field μSR measurements determine the magnetically order volume fraction is 87% from the two stripe twins, and the temperature evolution of the magnetic excitations is consistent with the low energy excitations coming from the magnetically ordered volume of the material. We will discuss how these results contrast with the proposed origin of a similar wave vector offset recently observed in a La-based cuprate, and possible origins of this effect in La2NiO4.11.

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