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25 papers · 1 filter
Quantum group symmetry of integrable models on the half-line
Gustav W Delius, Alan George
This contribution to the Proceedings of the Workshop on Integrable Theories, Solitons and Duality in Sao Paulo in July 2002 summarizes results from the papers hep-th/0112023 and ma…
The physical graviton two-point function in de Sitter spacetime with S^3 spatial sections
Atsushi Higuchi, Richard H. Weeks
We compute the physical graviton two-point function in de Sitter spacetime with three-sphere spatial sections. We demonstrate that the large-distance growth present in the correspo…
Diophantine approximation and the solubility of the Schroedinger equation
Simon Kristensen
We characterise the set of periods for which number theoretical obstructions prevent us from finding periodic solutions of the Schroedinger equation on a two dimensional torus as w…
Finite size effects and the supersymmetric sine-Gordon models
Clare Dunning
We propose nonlinear integral equations to describe the groundstate energy of the fractional supersymmetric sine-Gordon models. The equations encompass the N=1 supersymmetric sine-…
Semigroups of left quotients: existence, straightness and locality
Victoria Gould
A subsemigroup S of a semigroup Q is a local left order in Q if, for every maximal subgroup H of Q, the intersection of S with H is a local left order in the sense of group theory.…
One-qubit reduced states of a pure many-qubit state: polygon inequalities
A. Higuchi, A. Sudbery, J. Szulc
We show that a necessary and sufficient condition for a set of one-qubit mixed states to be the reduced states of a pure -qubit state is that their smaller eigenvalues shoul…