  The concept of opinion particles can be introduced by studying
time-continuous versions of Bayesian-inspired opinion dynamics methods. Here,
we use opinion particles to further explore how information and Bayesian
methods can contribute new ideas to physical problems. Continuous-time limits
are shown to correspond to the case with little trust between the original
agents, and a synchronous version of the model is studied. The interaction
between two particles is defined as attractive. However, space and distances
are not well represented in the model. We define a local measure of distances
based on the parameters. That allows distant particles to be repelled in the
natural coordinates of any central particle, similar to the observed
cosmological effects identified as dark energy.
  Keywords: Opinion dynamics, Opinion particles, Dark energy, Bayesian methods,
CODA
