Bosons doubling

@article{Mohrbach2000BosonsD,
  title={Bosons doubling},
  author={Herv'e Mohrbach and Alain B{\'e}rard and Pierre R{\'e}al Gosselin},
  journal={The European Physical Journal C - Particles and Fields},
  year={2000},
  volume={17},
  pages={455-459}
}
Abstract. It is shown that next-nearest-neighbor interactions may lead to unusual paramagnetic or ferromagnetic phases which physical content is radically different from the standard phases. Actually there are several particles described by the same quantum field in a manner similar to the species doubling of the lattice fermions. The renormalizability of the theory is proven at the one loop level. 
1 Citations

Higher time derivatives in the microcanonical ensemble describe dynamics of flux-coupled classical and quantum oscillators

We show that it is possible to consistently describe dynamical systems, whose equations of motion are of degree higher than two, in the microcanonical ensemble, even if the higher derivatives aren't

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