Results 21 to 30 of about 1,660,234 (361)

Transfer of Unitary Representations [PDF]

open access: yesAsian Journal of Mathematics, 2004
Introduction. This paper has as its primary purpose a clear exposition of the idea in [21] which we describe as transfer between real forms of a semi-simple Lie group over C. The basic point is that there are representations of one real form that can be more easily understood in the context of another real from.
Wallach, Nolan R., Zhu, Chen-Bo
openaire   +2 more sources

The conjugacy relation on unitary representations [PDF]

open access: yesMathematical Research Letters, 2012
We show that the unitary conjugacy relation for unitary representations of a second countable locally compact group on a separable Hilbert space is a Borel equivalence relation.
Hjorth, Greg, Törnquist, Asger Dag
openaire   +3 more sources

On Constructing Informationally Complete Covariant Positive Operator-Valued Measures

open access: yesEntropy, 2023
We study a projective unitary representation of the product G=G˜×G, where G is a locally compact Abelian group and G^ is its dual consisting of characters on G.
Grigori Amosov
doaj   +1 more source

Representation and design of wavelets using unitary circuits [PDF]

open access: yes, 2016
The representation of discrete, compact wavelet transformations (WTs) as circuits of local unitary gates is discussed. We employ a similar formalism as used in the multiscale representation of quantum many-body wave functions using unitary circuits ...
G. Evenbly, S. White
semanticscholar   +1 more source

Homotopy representations of the unitary groups [PDF]

open access: yesAlgebraic & Geometric Topology, 2016
Let $G$ be a compact connected Lie group and let $ , $ be complex vector bundles over the classifying space $BG$. The problem we consider is whether $ $ contains a subbundle which is isomorphic to $ $. The necessary condition is that for every prime $p$ the restriction $ |_{BN_p^G}$, where $N_p^G$ is a maximal $p$-toral subgroup of $G$, contains a
Lubawski, Wojciech   +1 more
openaire   +4 more sources

A note on cocycles of unitary representations [PDF]

open access: yesProceedings of the American Mathematical Society, 1976
Given a unitary representation U U of a locally compact abelian group G G , we investigate the relationship between two cocycles a 1 , a 2 : V a 1
William Parry, Klaus Schmidt
openaire   +2 more sources

Covariant catalysis requires correlations and good quantum reference frames degrade little [PDF]

open access: yesQuantum, 2023
Catalysts are quantum systems that open up dynamical pathways between quantum states which are otherwise inaccessible under a given set of operational restrictions while, at the same time, they do not change their quantum state.
Lauritz van Luijk   +2 more
doaj   +1 more source

Hamiltonian Quantization of Chern-Simons theory with SL(2,C) Group [PDF]

open access: yes, 2002
We analyze the hamiltonian quantization of Chern-Simons theory associated to the universal covering of the Lorentz group SO(3,1). The algebra of observables is generated by finite dimensional spin networks drawn on a punctured topological surface.
Alekseev A Yu   +22 more
core   +5 more sources

On cospectrality of gain graphs

open access: yesSpecial Matrices, 2022
We define GG-cospectrality of two GG-gain graphs (Γ,ψ)\left(\Gamma ,\psi ) and (Γ′,ψ′)\left(\Gamma ^{\prime} ,\psi ^{\prime} ), proving that it is a switching isomorphism invariant.
Cavaleri Matteo, Donno Alfredo
doaj   +1 more source

The unitary representations of the Poincar\'e group in any spacetime dimension

open access: yesSciPost Physics Lecture Notes, 2021
An extensive group-theoretical treatment of linear relativistic field equations on Minkowski spacetime of arbitrary dimension $D\geqslant 3$ is presented.
Xavier Bekaert, Nicolas Boulanger
doaj   +1 more source

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