Results 11 to 20 of about 13,825 (298)

Symmetry operators of Kranz products

open access: yesJournal of Combinatorial Theory, Series A, 1971
AbstractIn this paper we consider the linear algebraic analogs of certain classes of combinatorial identities connected with the problem of enumeration under group actions. The relationship between symmetry operators of Kranz products with abelian characters and their underlying subgroups is explored. Some applications to combinatorics are discussed.
Williamson, S.G
core   +3 more sources

Symmetry Operators and Separation of Variables for Dirac's Equation on Two-Dimensional Spin Manifolds

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2011
A signature independent formalism is created and utilized to determine the general second-order symmetry operators for Dirac's equation on two-dimensional Lorentzian spin manifolds. The formalism is used to characterize the orthonormal frames and metrics
Alberto Carignano   +3 more
doaj   +3 more sources

Symmetry Operators for the Fokker-Plank-Kolmogorov Equation with Nonlocal Quadratic Nonlinearity

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2007
The Cauchy problem for the Fokker-Plank-Kolmogorov equation with a nonlocal nonlinear drift term is reduced to a similar problem for the correspondent linear equation.
Alexander V. Shapovalov   +2 more
doaj   +2 more sources

Symmetry and Intertwining Operators for the Nonlocal Gross-Pitaevskii Equation

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2013
We consider the symmetry properties of an integro-differential multidimensional Gross-Pitaevskii equation with a nonlocal nonlinear (cubic) term in the context of symmetry analysis using the formalism of semiclassical asymptotics.
Aleksandr L. Lisok   +2 more
doaj   +3 more sources

Symmetries of modified Dirac operators in supergravity flux backgrounds

open access: yesNuclear Physics B
Modifications of Dirac operators in supergravity flux backgrounds are considered. Modified spin curvature operators and squares of modified Dirac operators corresponding to Schrödinger-Lichnerowicz-like formulas are obtained for different types of flux ...
Ümit Ertem
doaj   +3 more sources

Exact Solutions and Symmetry Operators for the Nonlocal Gross-Pitaevskii Equation with Quadratic Potential [PDF]

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2005
The complex WKB-Maslov method is used to consider an approach to the semiclassical integrability of the multidimensional Gross-Pitaevskii equation with an external field and nonlocal nonlinearity previously developed by the authors.
Alexander Shapovalov   +2 more
doaj   +2 more sources

Second order symmetry operators [PDF]

open access: yes, 2014
Using systematic calculations in spinor language, we obtain simple descriptions of the second order symmetry operators for the conformal wave equation, the Dirac–Weyl equation and the Maxwell equation on a curved four-dimensional Lorentzian manifold. The
Bäckdahl, T.   +3 more
core   +1 more source

Symmetry operators of the asymmetric two-photon quantum Rabi model

open access: yes, 2022
The true level crossings in a subspace of the asymmetric two-photon quantum Rabi model (tpQRM) have been observed when the bias parameter of qubit is an even multiple of the renormalized cavity frequency.
Chen, Qing-Hu, Xie, You-Fei
core   +2 more sources

Subsystem non-invertible symmetry operators and defects

open access: yesSciPost Physics, 2023
We explore non-invertible symmetries in two-dimensional lattice models with subsystem $\mathbb Z_2$ symmetry. We introduce a subsystem $\mathbb Z_2$-gauging procedure, called the subsystem Kramers-Wannier transformation, which generalizes the ordinary ...
Weiguang Cao, Linhao Li, Masahito Yamazaki, Yunqin Zheng
doaj   +1 more source

Detector operators for celestial symmetries

open access: yesJournal of High Energy Physics, 2023
Abstract This paper presents a systematic cataloging of the generators of celestial symmetries on phase space. Starting from the celestial OPEs, we first show how to extract a representation of the general-spin analog of the wedge subalgebra of w1+∞ on the phase space of massless matter fields of arbitrary helicity.
Yangrui Hu, Sabrina Pasterski
openaire   +3 more sources

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