Phantom Energy Mediates a Long-Range Repulsive Force

Cosmology with a long-range repulsive force

We discuss the properties of a cosmology dominated by a charged scalar field with a repulsive, long-range self-interaction. The interaction, in the form of a vector field with a tiny mass, can have a dramatic effect on the evolution of the universe, with interesting consequences – including in some cases accelerated expansion. One characteristic of the model is an oscillating deceleration param...

Clustering in a model with repulsive long-range interactions

A striking clustering phenomenon in the antiferromagnetic Hamiltonian Mean-Field model has been previously reported. The numerically observed bicluster formation and stabilization is here fully explained by a non linear analysis of the Vlasov equation.

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Nature of Long-Range Order in Stripe-Forming Systems with Long-Range Repulsive Interactions

Alejandro Mendoza-Coto, Daniel A. Stariolo, and Lucas Nicolao Departamento de Física, Universidade Federal do Rio Grande do Sul, CP 15051, 91501-970 Porto Alegre, RS, Brazil Departamento de Física, Universidade Federal do Rio Grande do Sul and National Institute of Science and Technology for Complex Systems, CP 15051, 91501-970 Porto Alegre, RS, Brazil Departamento de Física, Universidade Feder...

Comment on "Nature of Long-Range Order in Stripe-Forming Systems with Long-Range Repulsive Interactions".

We study two dimensional stripe forming systems with competing repulsive interactions decaying as r(-α). We derive an effective Hamiltonian with a short-range part and a generalized dipolar interaction which depends on the exponent α. An approximate map of this model to a known XY model with dipolar interactions allows us to conclude that, for α<2 long-range orientational order of stripes can e...