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4 papers · 2 filters
A group theoretical approach to structural transitions of icosahedral quasicrystals and point arrays
Emilio Zappa, Eric C. Dykeman, James A. Geraets +1
In this paper we describe a group theoretical approach to the study of structural transitions of icosahedral quasicrystals and point arrays. We apply the concept of Schur rotations…
Phase Transitions in Continuum Ferromagnets with Unbounded Spins
Alexei Daletskii, Yuri Kondratiev, Yuri Kozitsky
States of thermal equilibrium of an infinite system of interacting particles in a Euclidean space are studied. The particles bear 'unbounded' spins with a given symmetric a priori…
Negative energy densities in integrable quantum field theories at one-particle level
Henning Bostelmann, Daniela Cadamuro
We study the phenomenon of negative energy densities in quantum field theories with self-interaction. Specifically, we consider a class of integrable models (including the sinh-Gor…
The split property for locally covariant quantum field theories in curved spacetime
Christopher J. Fewster
The split property expresses the way in which local regions of spacetime define subsystems of a quantum field theory. It is known to hold for general theories in Minkowski space un…